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Artykuły w czasopismach na temat „Photonic Crystal; Plane Wave Expansion; Refractive Index”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Rezaei, Behrooz, Ibrahim Halil Giden, Mohammad Sadegh Zakerhamidi, Amid Ranjkesh, and Tae-Hoon Yoon. "Two-Dimensional Hybrid Photonic Crystal With Graded Low-Index Using a Nonuniform Voltage." Zeitschrift für Naturforschung A 75, no. 1 (2019): 65–71. http://dx.doi.org/10.1515/zna-2019-0144.

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AbstractWe proposed a new method for designing graded index lens using liquid crystal infiltration into annular photonic crystals. Applying an external nonuniform voltage in the transverse direction perpendicular to the direction of light propagation yields different orientation of liquid crystal molecules inside the photonic crystal unit cells. As a result, a gradient refractive index was modulated. We numerically investigate focusing properties of the designed graded index structure using plane-wave expansion and finite-difference time-domain methods. The gradient refractive index profile wa

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Kalyani, Vijay Laxmi, and Varsha Sharma. "Design Nanocavity Coupled Biosensor Based On 2D Photonic Crystal." Journal of Management Engineering and Information Technology (JMEIT) 4, no. 3 (2017): 3. https://doi.org/10.5281/zenodo.821240.

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In this paper we have presented a two dimensional photonic crystal based biosensor. The structure of biosensor consists a linear waveguide with nanocavity which is used for sensing purpose, their refractive index change according to sensing material. Plane wave expansion method use to find out a bandgap. For the purpose structure band gap is 1339 to 1981nm and input wavelength is 1550nm. The simulation results have analyzed by using the finite difference time domain (FDTD) method.

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Wellenzohn, Markus, Eva Melnik, Paul Muellner, Liam O’Faolain, and Rainer Hainberger. "Design of a Photonic Crystal Defect Waveguide Biosensor Operating in Aqueous Solutions at 1.34 µm." Proceedings 2, no. 13 (2018): 1026. http://dx.doi.org/10.3390/proceedings2131026.

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A two-dimensional photonic crystal defect waveguide sensor based on CMOS-compatible silicon-on-insulator technology was designed for operation in aqueous solutions at a wavelength of 1.34 µm, by the use of the 3D Plane Wave Expansion and the Finite Difference Time Domain simulation method. An operation under water in this wavelength regime allows for a significantly smaller propagation loss in contrast to the state-of-the-art operation wavelength of photonic crystals at 1.55 µm. The sensor working principle is label-free and based on evanescent wave sensing exploiting the local refractive inde

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Rajalakshmi, G., A. Sivanantha Raja, and D. Shanmuga Sundar. "Design and optimization of two dimensional photonic crystal based optical filter." Journal of Nonlinear Optical Physics & Materials 24, no. 03 (2015): 1550027. http://dx.doi.org/10.1142/s0218863515500277.

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In this paper, the channel drop filter based on two dimensional photonic crystal is proposed. The structure is made of silicon rods with the refractive index n1 = 3.4641 which are perforated in air with refractive index n2 = 1. The simulation results are obtained using 2D finite difference time domain (FDTD) method. The photonic band gap is calculated by plane wave expansion solver method. Resonant mode of the ring resonator and the filter transmission spectrum is calculated using 2D FDTD method. Full width half maximum (FWHM) bandwidth of the filter at the output transmission spectrum from 1.

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K., Venkatachalam, Robinson S., and Priya Reenu. "Performance analysis of 2D PC Resonant Cavity based Demultiplexer for CWDM Applications." Journal of Optical Communication Electronics 6, no. 1 (2020): 1–8. https://doi.org/10.5281/zenodo.3667014.

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<strong>In this paper, four port Photonic Crystal Resonant Cavity based different demultiplexers by varying radius and by altering the refractive index of rods in resonant cavities are proposed for CWDM applications. The proposed structure has bus waveguide, dropping waveguide and four resonant cavities in each demultiplexer. The performance parameters of demultiplexer such as transmission efficiency, spectral width, channel spacing, quality factor and resonant wavelength are analyzed. The first structure is able to drop four different channels which are centered at 1499 nm, 1501.7 nm, 1504.2

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Sharma, Varsha, and Vijay Laxmi Kalyani. "Design Two Dimensional Nanocavity Photonic Crystal Biosensor Detection in Malaria." International Journal of Emerging Research in Management and Technology 6, no. 6 (2018): 16. http://dx.doi.org/10.23956/ijermt.v6i6.239.

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In this paper we design a two dimensional (2-D) photonic crystal based biosensor implemented by linear waveguide and nanocavity detection in malaria. The bio molecules such as a red blood cell, infected red blood cell, trapped inside the nanocavity cause transmission shift at the output terminal. The sensing mechanism of biosensor is change in refractive index of analytes. The layout biosensor is consists a linear waveguide with a nanocavity in square symmetry For the proposed photonic based biosensor, the band gap from 2210nm to 1420 nm and input wavelength of 1550nm are used in this design.

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Adoghe, Anthony U., Etinosa Noma-Osaghae, and Rimamchika Israel Yabkwa. "Photonic Crystal and its Application as a Biosensor for the Early Detection of Cancerous Cells." International Journal of Online and Biomedical Engineering (iJOE) 16, no. 03 (2020): 86. http://dx.doi.org/10.3991/ijoe.v16i03.12523.

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<p>The motivation for this paper is the strikingly sad statistics, obtained from various research bodies globally, regarding the effect of cancers on the global populace and the impact of current methods put in place for the early diagnosis of cancer. This paper is novel for many reasons. Primarily, it presents the use of an optical biosensor based on photonic crystal for cancer cell detection. This biosensor was recently developed as an ultra-compact biochemical sensor based on a 2D photonic crystal cavity known for altering its spectrum in proportion to minute changes in refractive ind

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Jannesari, Reyhaneh, Gerald Pühringer, Gerald Stocker, Thomas Grille, and Bernhard Jakoby. "Design of a High Q-Factor Label-Free Optical Biosensor Based on a Photonic Crystal Coupled Cavity Waveguide." Sensors 24, no. 1 (2023): 193. http://dx.doi.org/10.3390/s24010193.

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In recent years, there has been a significant increase in research into silicon-based on-chip sensing. In this paper, a coupled cavity waveguide (CCW) based on a slab photonic crystal structure was designed for use as a label-free biosensor. The photonic crystal consisted of holes arranged in a triangular lattice. The incorporation of defects can be used to design sensor devices, which are highly sensitive to even slight alterations in the refractive index with a small quantity of analyte. The plane wave expansion method (PWE) was used to study the dispersion and profile of the CCW modes, and

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Benmerkhi, A., M. Bouchemat, and T. Bouchemat. "Computational Study of Photonic Crystal Resonator for Biosensor Application." Frequenz 73, no. 9-10 (2019): 307–16. http://dx.doi.org/10.1515/freq-2019-0025.

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Abstract A two dimensional photonic crystal biosensor with high quality factor, transmission and sensitivity has been theoretically investigated using two dimensional finite difference time domain method (FDTD) and plane-wave expansion (PWE) approach. The studied biosensor consisted of two waveguide couplers and one microcavity formed by removing one air pore. Following analyte injection into the sensing holes and binding, the refractive index changes inducing a possible shift in the resonant wavelength. For the optimized structure, the biosensor quality factor is found to be over 49,767 and t

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Simsek, S., S. Palaz, A. M. Mamedov, and E. Ozbay. "Fibonacci Sequences Quasiperiodic A5B6C7 Ferroelectric Based Photonic Crystal: FDTD analysis." Advanced Electromagnetics 6, no. 4 (2017): 6–10. http://dx.doi.org/10.7716/aem.v6i4.451.

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In this study, we present an investigation of the optical properties and band structures for the conventional and Fibonacci photonic crystals (PCs) based on some A5B6C7 ferroelectrics (SbSBr and BiTeCl). Here, we use one dimensional SbSBr and BiTeCl based layers in air background. We have theoretically calculated the photonic band structure and transmission spectra of SbSBr and BiTeCl based PC superlattices. The position of minima in the transmission spectrum correlates with the gaps obtained in the calculation. The intensity of the transmission depths is more intense in the case of higher ref

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Vijay, Laxmi Kalyani, PinkyJhakhar, and Sharma Varsha. "Design of a Two Dimensional Optical Biosensor Using Nanocavity." Journal of Management Engineering and Information Technology (JMEIT) 5, no. 6 (2019): 3. https://doi.org/10.5281/zenodo.2529766.

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In  this  research  paper  a  two  dimensional photonic crystal which is based on biosensor. The structure of biosensor consists a nano cavity with a linear waveguide which is useful for sensing purpose, their refractive index changes according to their sensing material. Here the plane wave  expansion method  is used  to  find out  the bandgap. For the purpose input wavelength is 1550nm and structure bandgap is 1339 to 1981nm. By using finite difference time domain  (FDTD)  method.  The  simulation  result  ha

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12

Naghizade, S., and S. M. Sattari-Esfahlan. "Excellent Quality Factor Ultra-Compact Optical Communication Filter on Ring-Shaped Cavity." Journal of Optical Communications 40, no. 1 (2019): 21–25. http://dx.doi.org/10.1515/joc-2017-0035.

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Abstract In this paper, we propose a high-quality factor (QF) ultra-compact structure for designing all optical filter based on two dimensional (2D) photonic crystals that can operate in third communication window range (1550 nm). The simulation results calculated by using 2D finite difference time domain (FDTD) method and photonic band gap (PBG) region are calculated by plane wave expansion (PWE) method. The average transmission efficiency, average QF and optical full width at half maximum (FWHM) bandwidth more than 95 %, 4300 and 0.4 nm obtained, respectively. The value of QF for the propose

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13

Purvi, Soni, and Kalyani Vijaylaxmi. "NANOCAVITY AND MICROCAVITY BASED PHOTONIC CRYSTAL BIOSENSOR FOR DENGUE DETETCTION." Journal of Management Engineering and Information Technology Get Adobe Flash player 6, no. 4 (2019): 1–5. https://doi.org/10.5281/zenodo.3381584.

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Abstract— Photonic crystal biosensors is a new, advance and  accurate measurement  technology  for  bio  sensing application.  In  this  paper,  a  two  dimensional  (2D) photonic  crystal  nanocavity  and microcavity  sensor  is designed for the detection of dengue using human blood plasma and platelets. The optical  properties of plasma and  platelets  are  observed  and  refractive  index  of normal  plasma,  infected  plasma,  normal  p

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Manjunatha N, Sarika Raga, Sanjay Kumar Gowre, and Hameed Miyan. "A 2D GaAs-Based Photonic Crystal Biosensor for Malaria Detection." International Journal of Engineering and Technology Innovation 13, no. 4 (2023): 328–36. http://dx.doi.org/10.46604/ijeti.2023.11660.

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Gallium arsenide (GaAs) composite semi-conductive rods with an air background lattice act as the building blocks for the photonic crystal structure used of a biosensor. The study presents a biosensor of a two-rod nano-cavity for identifying distinct stages of plasmodium falciparum in red blood cells (RBCs) in the early detection of malaria. The proposed biosensor enables the creation of a label-free biosensing environment in which optical and dispersion properties are investigated using plane wave expansion (PWE) and finite-difference time-domain (FDTD) techniques. The biosensor, with a sensin

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15

Fallahi, Vahid, and Mahmood Seifouri. "Design of a High-Quality Optical Filter Based on 2D Photonic Crystal Ring Resonator for WDM Systems." Journal of Optical Communications 41, no. 4 (2020): 355–61. http://dx.doi.org/10.1515/joc-2017-0218.

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AbstractIn this article, a 2D photonic crystal (PC)-based optical filter has been designed using a PC ring resonator. The resonator used is of square type with a square lattice constant, which has been designed by increasing the radius of the inner rods of the resonator. The filter designed can separate the light of the wavelength of 1545.3 nm with a transmission coefficient of 98 %. The bandwidth of the above wavelength is equal to 0.5 nm and hence the quality factor of the device at this wavelength is equal to 3091. The effects of the structural parameters, such as the refractive index, the

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Al-Hawary, Sulieman Ibraheem Shelash, Ahmed Alkhayyat, M. Mehdi Shafieezadeh, Ngakan Ketut Acwin Dwijendra, Eman Khalaf, and Iskandar Muda. "A Novel Microstructure of 2-Bit Optical Analog to Digital Converter Based on Kerr Effect Nonlinear Nanocavities in 2D Photonic Crystal." Journal of Sensors 2023 (January 6, 2023): 1–11. http://dx.doi.org/10.1155/2023/5795945.

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In this paper, an all-optical analog-to-digital converter based on nonlinear with silicon materials is designed and simulated. The proposed structure consists of three nonlinear nanocavity that control the optical signal power intensity. The nonlinear material used is aluminum gallium arsenide (AlGaAs). Aluminum gallium arsenide (AlGaAs) with a linear refractive index of n 0 = 1.4 and a nonlinear refractive index of n 2 = 1.5 × 10 − 17 . Due to the small path length of the waveguides, the optical signals move a short distance and as a result, the power optical losses along the path are reduced

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CHEN, TAO, CAILONG ZHENG, and JINXING LI. "MODE ANALYSIS AND SYSTEMATICAL DESIGN OF WIDE-BANDWIDTH PHOTONIC CRYSTAL 60° WAVEGUIDE BENDS WITH HIGH TRANSMISSION." Modern Physics Letters B 26, no. 26 (2012): 1250170. http://dx.doi.org/10.1142/s0217984912501709.

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We present a procedure to enhance the transmission efficiency of a photonic crystal slab waveguide bend by introducing an air hole with the same radius at the center of bend and optimizing the positions of three neighboring holes in the corner. The improvement relies only on the method of displacing holes which is technologically preferred to controlling variations in hole size or shape. We employ the effective refractive index approach and two-dimensional plane wave expansion method to analyze the guide modes of the straight waveguide and waveguide bend. The transmission character of bent wav

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Anusooya, V., S. Ponmalar, and M. S. K. Manikandan. "Photonic-crystal-based design and FDTD simulation of all-optical NAND and NOR gates with improved contrast ratio." Laser Physics 32, no. 1 (2021): 016202. http://dx.doi.org/10.1088/1555-6611/ac3514.

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Abstract The proposed research reports the simulation of a photonic crystal (PhC) ring-resonator-based full-optical NAND and NOR gate design. The designed structure comprises a 18 × 30 square lattice dielectric silicon rod-type PhC with a refractive index of n = 3.46. An interatomic distance ‘a’ of 560 nm, radius ‘r’ of 0.21a (0.133 μm) and input wavelength λ = 1550 nm with an input signal amplitude of 1 volt are used in this design. The proposed structure provides two large band gaps in Transverse Electric polarized mode in the ranges of 1342–1980 nm and 758–779 nm. Similar parameters are use

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Ghoumazi, Mehdi, and Messaoud Hameurlain. "Study and Simulation of a Sensor Based on 2D Photonic Crystals for the Detection of Aromatic Compounds: C6H5I, C6H5F and C6H5Cl." Annales de Chimie - Science des Matériaux 45, no. 4 (2021): 335–39. http://dx.doi.org/10.18280/acsm.450409.

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A new study was presented on a new sensor based on two-dimensional photonic crystals (Phc's) to detect the following three organic materials: iodobenzene (C6H5I), fluorobenzene (C6H5F), chlorobenzene (C6H5Cl). These materials have dielectric constants (εr) equal to 2.623; 2.140; 2.318, respectively. The proposed sensor is a structure made of silicon rods submerged in air plus a ring resonator. The ring resonator is stuck between two horizontal waveguides. At the end of the ends of the structure there are four ports where port 1 and 2 belong to the top guide and port (3) and (4) the bottom one.

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Jiang, Ping, Kang Xie, Huajun Yang, and Zhenhai Wu. "Negative Propagation Effects in Two-Dimensional Silicon Photonic Crystals." International Journal of Photoenergy 2012 (2012): 1–7. http://dx.doi.org/10.1155/2012/702637.

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We demonstrated negative refraction effects of light propagating in two-dimensional square and hexagonal-lattice silicon photonic crystals (PhCs). The plane wave expansion method was used to solve the complex eigenvalue problems, as well as to find dispersion curves and equal-frequency contour (EFC). The finite-difference time-domain (FDTD) method was used to simulate and visualize electromagnetic wave propagation and scattering in the PhCs. Theoretical analyses and numerical simulations are presented. Two different kinds of negative refractions, namely, all-angle negative refraction (AANR) wi

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Mohammadi, Masoud, Mahmood Seifouri, Elham Boyerahmadi, and R. Udaiyakumar. "Exploring Refractive Index Ultra Compact Nano Sensor Using Photonic Crystal Resonant Cavities." Journal of Computational and Theoretical Nanoscience 17, no. 7 (2020): 2926–31. http://dx.doi.org/10.1166/jctn.2020.9271.

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In this paper, an ultra-compact photonic crystal sensor based resonant cavities is proposed with improved quality factor, sensitivity and detection limit. The proposed sensor has 2D pillar photonic crystals with hexagonal array of dielectric rods. The refractive index of dielectric rods, radius of rods, filling factor (r/a) and lattice constant of the proposed structure are 3.46, 108 nm, 0.2 and 542 nm, respectively. The mean transmission efficiency, Quality factor, sensitivity, Figure of Merit (FOM) and limit of detection (LOD) are calculated as 92.2%, 9975.8, 371 nm/RIU, 2366 and 4.5 x 10-5

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Fan, S. S., R. Guo, Z. Y. Li, and W. H. Huang. "Simulation of 3D Layer-By-Layer Photonic Crystals." Solid State Phenomena 121-123 (March 2007): 1165–70. http://dx.doi.org/10.4028/www.scientific.net/ssp.121-123.1165.

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3D layer-by-layer photonic crystals possess a full photonic band gap. Simulation of 3D layer-by-layer photonic crystals can optimize the parameters of the photonic crystals to get useful photonic band gap by solving Maxwell’s equations using the plane-wave-based transfer-matrix method. The relations between the parameters (rod pitch a, rod width w, rod thickness h and rod refractive index n) and the photonic band gap have been simulated. We also have fabricated a 3D layer-by-layer photonic crystal with femtosecond laser microfabrication technique through two-photon-absorption photopolymerizati

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Wan, Yong, Ming Hui Jia, Hao Wen Gong, Yang Yang, and Ying Cui. "Lens Design with Silicon Wafer for Terahertz Wave Transmission." Applied Mechanics and Materials 214 (November 2012): 227–31. http://dx.doi.org/10.4028/www.scientific.net/amm.214.227.

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Terahertz waves can pass through silicon wafer with less loss than traditional lenses. By selecting square, circular and sectors as building blocks, a serial of equivalent lenses for terahertz wave transmission were designed in the vertical plane of the silicon wafer, including hemispherical convex, concave mirror, triangular prism and spherocylinder lenses. The lens’ 2-D design in this work is much simpler than its actual 3-D shape. Besides high transmit ability, silicon wafer also has high refractive index. When a lens is oriented horizontally, it can act as a graded-index photonic crystal w

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Li, Jian Hua, Fei Huang, Yi Yang, Bao Fu Zhang, and Hua Zhou. "High Birefringent Terahertz Photonic Crystal Fiber Based on Material-Filled Structure." Applied Mechanics and Materials 462-463 (November 2013): 599–603. http://dx.doi.org/10.4028/www.scientific.net/amm.462-463.599.

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A novel kind of high birefringent terahertz (THz) photonic crystal fibers (PCFs) with material-filled structure is proposed in this paper. Based on the material-filled technology, which different materials are selectively filled into four air holes of the inner first circle near the central core in the designed THz PCFs, high birefringence are obtained from the structural and material-filled induced asymmetry in large frequency ranges near 1THz. Modal birefringence with different structural parameters and diverse refractive indices of the filled materials are investigated by plane wave expansi

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Li, Renxian, Huan Tang, Mingyu Zhang, et al. "Tunable Photonic Hook Design Based on Anisotropic Cutting Liquid Crystal Microcylinder." Photonics 11, no. 8 (2024): 736. http://dx.doi.org/10.3390/photonics11080736.

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The selective control and manipulation of nanoparticles require developing and researching new methods for designing optical tweeters, mainly based on a photonic hooks (PHs) effect. This paper first proposes a tunable PH in which a structured beam illuminates an anisotropic cutting liquid crystal microcylinder based on the Finite-DifferenceTime-Domain (FDTD) method. The PHs generated by plane wave, Gaussian, and Bessel beam are analyzed and compared. The impact of beams and LC particle parameters on the PHs are discussed. Where the influence of the extraordinary refractive index (ne) on PHs is

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Dabas, Bhawana, Monika Rajput, and R. K. Sinha. "Analysis and Comparison of Dispersion Properties of Hexagonal and Square Lattice Photonic Crystal Fiber." Applied Mechanics and Materials 110-116 (October 2011): 57–60. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.57.

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In this paper, we compare the dispersion properties (flattened, zero and negative dispersion) and effective area in hexagonal and square lattice PCF with different hole-to-hole spacing (Λ) and air hole diameter (d) by using Fully Vectorial Effective Index Method (FVEIM). The analysis is carried out in wavelength range from 1.3 µm to 1.6 µm. We also use plane wave expansion method for comparison of effective cladding index in both above lattices.

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Jasim, Mohammed Salim Jasim AL-Taie. "Study Effect Self-Frequency Shift of A Soliton in A Liquid Core Photonic Crystal Fibre." Malaysian Journal of Applied Sciences 7, no. 2 (2022): 64–74. http://dx.doi.org/10.37231/myjas.2022.7.2.335.

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In this study, the dispersion curve family reveals that changing the liquid core fluoro-ethylene increases the dispersion curve and causes the curve to flatten at sugar solution 60% with the second zero dispersion point of the wavelength as the refractive index rises. The two zero dispersion wavelength shifts toward the visible region, and it's clear that Soliton's intensity at the second zero dispersion point is around 10% to 25% of its maximum. These peaks are further subdivided into low amplitude dispersive waves depending on the liquid core used at the anomalous region of the fiber. When a

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Nurligareev, D. Kh, I. A. Nedospasov, and K. Yu Kharitonova. "Reflections of linearly polarized electromagnetic waves from a multilayer periodic mirror." Russian Technological Journal 12, no. 6 (2024): 69–79. https://doi.org/10.32362/2500-316x-2024-12-6-69-79.

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Objectives. The purpose of the article is to carry out a theoretical and experimental study of the angular reflection spectrum of linearly polarized electromagnetic waves from a multilayer periodic mirror on a transparent substrate to exact analytical expressions for reflection and transmission coefficients generalizing the cases of incidence of plane transverse electric (TE) and transverse magnetic (TM) modes on limited periodically structured media with a stepped refractive index profile.Methods. The theoretical analysis of the reflection problem is based on the search for exact analytical s

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Shirakbari, N., SR Ghaffarian, and M. Mohseni. "Fabrication and simulation of inverse poly(ferrocenylmethylvinylsilane)/silica opal structures and their optical properties." Journal of Composite Materials 51, no. 11 (2016): 1595–604. http://dx.doi.org/10.1177/0021998316658541.

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Photonic crystal structures were fabricated by the formation of periodic arrays of poly(ferrocenylsilane) (PFS) derivations and silica spheres. Here, we present the primary steps of a simulation-driven design of photonic crystal based on PFS as a potentially stimuli-responsive polymer, which can present predesigned color when subjected to the visible light. The poly(ferrocenylmethylvinylsilane) (PFMVS) was synthesized by photolytic anionic ring opening polymerization of methylvinylsila[1]ferrocenophane monomer under controlled condition and monodisperse silica spheres were synthesized by the S

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Gharsallah, Zaineb, Monia Najjar, and Vijay Janyani. "Slow Light Investigation on Power Consumption of Lithium Niobate Phc Switch Based on Linear Electro-Optic Effect." Journal of Optical Communications 41, no. 2 (2020): 145–51. http://dx.doi.org/10.1515/joc-2017-0171.

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AbstractIn this work, an optical switch based on electro-optic effect is reported. We used defect mode in two-dimensional photonic crystal made of Lithium Niobate. Under an applied voltage of 3 V, a refractive index change of −0.0702 is obtained which has led to a transmittance contrast about 60% for the ON state and a high extinction ratio of about 20 dB. Moreover, Slow light structure performance is investigated to optimize proposed optic switch. Due to elliptic shape of holes, the applied voltage is decreased to 0.5 V. Also, a refractive index change decrease around −0.0481, a transmittance

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Díaz-Escobar, Evelyn, Laura Mercadé, Ángela I. Barreda, Jaime García-Rupérez, and Alejandro Martínez. "Photonic Bandgap Closure and Metamaterial Behavior in 1D Periodic Chains of High-Index Nanobricks." Photonics 9, no. 10 (2022): 691. http://dx.doi.org/10.3390/photonics9100691.

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It has been shown that the photonic bandgap of one-dimensional (1D) dielectric periodic thin films can vanish at the first Bragg condition for TM modes. Here, we address the case of 1D photonic crystal slabs formed by a chain of high-index dielectric particles with transversal confinement and show that the Bragg bandgap can vanish for both TE- and TM-like modes. Calculations using plane-wave expansion and finite-difference time-domain methods confirm that the PBG vanishes. PBG closure is explained as being a result of the interplay between the electric and magnetic dipole resonances of the iso

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Zhu, Kongtao, Hongxue Yang, and Hui Du. "Slow Light Tuning in Annular Slotted Photonic Crystal Waveguide with Incoming Polymer." Journal of Physics: Conference Series 2109, no. 1 (2021): 012008. http://dx.doi.org/10.1088/1742-6596/2109/1/012008.

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Abstract An advanced post-processing scheme of reconfigurable dielectric infiltration into an annular slotted photonic crystal waveguide (ASPhCW) is proposed in this paper. Ionic liquids have had prominent effects in enhancing the optical properties of photonic crystals, especially in the aspect of tuning the transmission rate and velocity through optical materials. Using the two-dimensional plane wave expansion method, the flat band dispersion of the slow light is obtained and the tuning of the operating wavelength of the crystal could be realized by incoming polymer technology. The operating

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Verevkina, Ksenia, Ilya Verevkin, and Valeriy Yatsyshen. "Optical Diagnostics of Defects in Laminated Periodic Nanostructures." NBI Technologies, no. 1 (March 2022): 19–26. http://dx.doi.org/10.15688/nbit.jvolsu.2022.1.4.

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The purpose of this work is to study the features of the properties of a plane wave incident on a layered and periodic medium with an embedded defective layer. The relevance of the study of photonic crystals is due to the fact that this area of modern materials science is widely developing in the world of science. A confirmation of the large growth in development is the specificity of the versatile application and implementation of photonic crystals. For example, it becomes possible to create digital computing devices based on photonics. The possibility of creating new types of lasers with the

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Dixit, Achyutesh, and Praveen Chandra Pandey. "Off-axis photonic bands of hexagonal plasma photonic crystal fiber containing elliptical holes with defect of high index material for nonlinear waves by PWE method." Modern Physics Letters B 31, no. 14 (2017): 1750156. http://dx.doi.org/10.1142/s0217984917501561.

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A novel model of hexagonal photonic crystal fiber (PCF) composed of fluoride-doped silicate and plasma materials for estimating the off-axis band structure has been presented. The well-known plane wave expansion (PWE) method has been adopted for the analysis of band structure. We have observed the influence of intensity of field on photonic band gap (PBG) by creating different types of defect in the holes of the PCF structure for the design of waveguide and narrow-band filter. A dynamic shift in bands and photonic band gaps (PBGs) has been reported and compared with other designs. The PCF cont

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Taverne, Mike P. C., Ying-Lung D. Ho, and John G. Rarity. "Strongly Confining Light with Air-Mode Cavities in Inverse Rod-Connected Diamond Photonic Crystals." Crystals 12, no. 3 (2022): 303. http://dx.doi.org/10.3390/cryst12030303.

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Three-dimensional dielectric optical crystals with a high index show a complete photonic bandgap (PBG), blocking light propagation in all directions. We show that this bandgap can be used to trap light in low-index defect cavities, leading to strongly enhanced local fields. We compute the band structure and optimize the bandgap of an inverse 3D rod-connected diamond (RCD) structure, using the plane-wave expansion (PWE) method. Selecting a structure with wide bandgap parameters, we then add air defects at the center of one of the high-index rods of the crystal and study the resulting cavity mod

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Jandieri, Yasumoto, Pistora, and Erni. "Analysis of Scattering by Plasmonic Gratings of Circular Nanorods Using Lattice Sums Technique." Sensors 19, no. 18 (2019): 3923. http://dx.doi.org/10.3390/s19183923.

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A self-contained formulation for analyzing electromagnetic scattering by a significant class of planar gratings composed of plasmonic nanorods, which were infinite length along their axes, is presented. The procedure for the lattice sums technique was implemented in a cylindrical harmonic expansion method based on the generalized reflection matrix approach for full-wave scattering analysis of plasmonic gratings. The method provided a high computational efficiency and can be considered as one of the best-suited numerical tools for the optimization of plasmonic sensors and plasmonic guiding devi

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Saad, M. M., and S. E. A. Yousif. "Structural and optoelectronic properties of CsSnBr3 metal halide perovskite as promising materials toward novel-generation optoelectronics." Chalcogenide Letters 19, no. 2 (2022): 153–62. http://dx.doi.org/10.15251/cl.2022.192.153.

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In this study, first-principles density functional theory (DFT) calculations of the structural and optoelectronic properties of Sn-based inorganic metal halide perovskite CsSnBr3 are carried out and discussed in details. The Wu-Cohen (WC)-Generalized Gradient Approximation (GGA) based on the full-potential linearized augmented plane-wave (FPLAPW) method is used to optimize the geometry structure of unit cell and then find the accurate optoelectronic properties of CsSnBr3. Analysis of structural optimization results revealed that the lattice parameters (𝑎0 = 5.776 Å) and unit cell volume of CsS

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Mohsenirad, Hamideh, Saeed Olyaee, and Mahmood Seifouri. "Design of a new two-dimensional optical biosensor using photonic crystal waveguides and a nanocavity." Photonics & Lasers in Medicine 5, no. 1 (2016). http://dx.doi.org/10.1515/plm-2015-0033.

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AbstractIn this paper, a two-dimensional photonic crystal biosensor for medical applications based on two waveguides and a nanocavity is presented. The waveguides and nanocavity are created by introducing line and point defects into a photonic crystal, respectively. It could be shown that by injecting an analyte into a sensing hole, and thus changing its refractive index, may shift the resonant wavelength. The proposed structure is designed for the wavelength range of 1.5259–1.6934 μm. Sensitivity, the most important biosensor parameter, was studied and found to be approximately equal to 83.75

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Ghoumazi, Mehdi, and Abdesselam Hocini. "Photonic Crystal Based Bio-Sensor Detection in Nanophotonic Structure Using FEM Method." International Journal of Sensors, Wireless Communications and Control 10 (December 18, 2019). http://dx.doi.org/10.2174/2210327910666191218125109.

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: A bio-sensing platform on nano cell–coupled photonic crystal waveguide is proposed for different organic liquids detection. In this paper, we have studied a nanostructure of two- dimensional photonic crystal (PhC). This nanostructure is a sensor design, which can detect different organic liquids such as water (H2O), ethanol (Ch3-CH2-OH), glycerol (C3H8O3), benzene (C6H6), and bromine (Br2) with the following refractive index respectively: 1.333, 1.361, 1.4729, 1.501 and 1.659. To examine the sensing principle, silicon rod based square lattice photonic crystal nanostructure with the refractiv

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Heydari, Afsaneh, Ali Bahrami, and Abbas Mahmoodi. "All-Optical XOR, XNOR, NAND and OR Logic Gates Based on Photonic Crystal 3-DB Coupler for BPSK Signals." Journal of Optical Communications, February 6, 2019. http://dx.doi.org/10.1515/joc-2018-0228.

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AbstractWe propose a very compact structure for all-optical XOR, XNOR, NAND and OR logic gates based on photonic crystal 3-dB coupler in binary-phase-shift-keyed (BPSK) signals. The square lattice of dielectric rods in SiO2 background has been considered for photonic crystal structure. The photonic band gap (PBG) and light propagation simulations of proposed logic structure have been accomplished by plane wave expansion and finite difference time domain methods. The proposed structure can achieve logical function when the refractive index of all rods and substrate is fabricated with relaxed er

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Muthu, K. Esakki, VN Jannath Ul Firthouse, S. Sorna Deepa, A. Sivanantha Raja, and S. Robinson. "Design and Analysis of 3-Input NAND/NOR/XNOR Gate Based on 2D Photonic Crystals." Journal of Optical Communications, January 23, 2019. http://dx.doi.org/10.1515/joc-2018-0210.

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AbstractIn this paper, Two Dimensional (2D) Photonic Crystal (PhC) based 3-input all optical NOR, NAND and XNOR gates is proposed and designed. The proposed device is formed by the combination of line defects and square cavity. The performance of the device is analyzed using 2D Finite Difference Time Domain (FDTD) method. The band gap analysis is done by Plane Wave Expansion (PWE) method. The device has the lattice constant and refractive index of 616 nm and 3.46, respectively. The dimension of the proposed structure is about 12.5 µm*12 µm which is highly compact and suitable for photonic inte

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S, Geerthana, Sridarshini T, Syed Akbar S, et al. "A Novel 2D-PhC based Ring Resonator design with Flexible Structural Defects for CWDM Applications." Physica Scripta, September 15, 2023. http://dx.doi.org/10.1088/1402-4896/acfa43.

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Abstract In this article, a chain-shaped photonic crystal-based ring resonator (PhCRR), which can function as a channel drop filter (CDF), is designed using two-dimensional photonic crystals. Silicon rods with a refractive index of 3.44 are chosen, and they are perforated in the air with a refractive index of 1 for the PhCRR layout design. Silicon material is selected for realizing the PhCRR-based channel drop filter because it exhibits nearly zero absorption in the C-band (1530 - 1565 nm) spectral region. The PhCRR structure is established within two-dimensional hexagonal lattices. Transmissi

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Dinodiya, Sapna, Bhuvneshwer Suthar, and Anami Bhargava. "High Sensitivity Temperature Sensor Based on Two-Dimensional Photonic Crystal." Jurnal OptoElektronik, July 15, 2021. http://dx.doi.org/10.53655/joe.e3462y.

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In this work, a two-dimensional photonic crystal ring resonator based temperature sensor is investigated. The device consists of a hexagonal array of air holes surrounded by the base material of germanium (Ge). The sensing mechanism is based on the shifting of transmission peak with refractive index changes in Ge induced by variation of temperature. Simulation results are obtained using finite difference time domain method (FDTD). The photonic band gap is studied by plane wave expansion method (PWE). The sensor has high sensitivity of 270 pm/K and high quality factor of 2028.86 with` wide rang

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Deyasi, Arpan, Ratul Ghosh, Papri Chakraborty, Anwesha Adhikary, and Angsuman Sarkar. "Investigating Fill Factor Effect on Brillouin Zone of Metamaterial-based 2D Photonic Crystal." Micro and Nanosystems 13 (February 10, 2021). http://dx.doi.org/10.2174/1876402913666210210155312.

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: Fill factor in the negative permittivity materials are tailored within physically permissible limit to characterize the Brillouin zone for two-dimensional crystal under propagation of both s and p-polarized waves. Two lowermost bandgaps are computed along with corresponding midband frequencies, where plane wave expansion method is invoked for computational purpose. Rectangular geometrical shape is considered for the simulation, and all the results are calculated inside the ‘Γ’ point and ‘X’ point of first Brillouin zone. Simulated findings depict monotonous variations of both bandgap width a

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Kebaili, Farida, Ahlam Harhouz, and Abdesselam Hocini. "Designing an Advanced Biosensor for Rapid Analysis and Detection of Blood Components." Journal of Microwaves, Optoelectronics and Electromagnetic Applications 24, no. 1 (2025). https://doi.org/10.1590/2179-10742025v24i1289725.

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Abstract In this study, we propose a novel biosensor based on a hexagonal-shaped microcavity with two slot waveguides within a two-dimensional photonic crystal. The biosensor aims to detect various blood components by utilizing a refractive index measurement. The device operates in the TM-polarized light wavelength range of 1150-1880 nm. It consists of two slot waveguides coupled with a hexagonal-shaped microcavity, formed by removing seven lattice holes. The microcavity is separated from the waveguides by two holes. When the analyte infiltrates the cavity, it induces a change in refractive in

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Gupta, Priyanka Kumari, Punya Prasanna Paltani, and Shrivishal Tripathi. "Pressure Sensor Based on Two-Dimensional Photonic Crystal Ring Resonator." Physica Scripta, November 16, 2023. http://dx.doi.org/10.1088/1402-4896/ad0d99.

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Abstract This paper proposes a novel pressure sensor utilizing a two-dimensional photonic crystal (2DPC) based on a ring resonator design. The sensor consists of a square ring resonator that is connected to two photonic crystal waveguides. The photonic crystal is comprised of a square lattice of circular Silicon dielectric rods with air serving as a background. The proposed sensor operates within a pressure range of 0 to 6 GPa, corresponding to a wavelength range of 1554 nm to 1569 nm. The band structures and transmission characteristics of the proposed sensor are studied using the plane wave

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Gorkunov, Maxim V., Alexander A. Antonov, Alena V. Mamonova, Egor A. Muljarov, and Yuri Kivshar. "Substrate‐Induced Maximum Optical Chirality of Planar Dielectric Structures." Advanced Optical Materials, November 2, 2024. http://dx.doi.org/10.1002/adom.202402133.

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AbstractResonant dielectric planar structures can interact selectively with light of particular helicity thus providing an attractive platform for chiral flat optics. The absence of mirror‐symmetry planes defines geometric chirality, and it remains the main condition for achieving strong circular dichroism. For planar optical structures such as photonic‐crystal slabs and metasurfaces, breaking the out‐of‐plane mirror symmetry is especially challenging, as it requires to fabricate meta‐atoms with a tilt, variable height, or vertically shifted positions. Although transparent substrates formally

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Kannaiyan, Venkatachalam, Sriram Kumar Dhamodharan, and Robinson Savarimuthu. "Investigation of 2D-PC Ring Resonator-Based Demultiplexer for ITU-T G.694.1 WDM Systems." Journal of Optical Communications, May 25, 2018. http://dx.doi.org/10.1515/joc-2018-0037.

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AbstractIn this proposed work, we have designed two-dimensional photonic crystal ring resonator (2DPC-RR)-based eight-channel demultiplexer for dense wavelength division multiplexing (DWDM) systems. The performance parameters of the proposed demultiplexer such as resonant wavelength, spectral width, quality factor, channel spacing and crosstalk are investigated. The demultiplexer consists of bus waveguide, quasi-square RR and L bend waveguides. Each quasi-square RR has eight-shaped microcavity with different refractive index, which plays an active role for channel selection. The plane wave exp

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Askarian, Asghar, and Fariborz Parandin. "Investigations of all optical 2×4 decoder based on PhC structure and nonlinear ring resonators." Microwave and Optical Technology Letters 66, no. 11 (2024). http://dx.doi.org/10.1002/mop.70004.

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AbstractIn this paper, all optical 2 × 4 decoder (AODEC) is provided using threshold switching method in 2D photonic crystal (PC) structures which has low optical loss and most widely used in photonic integrated circuits (PICs). The proposed optical decoder is designed using silicon pillars with a refractive index of 3.46 perforated in the air background in a cubic lattice with a lattice constant of 585 nm. The proposed structure is composed of seven optical waveguides and three nonlinear ring resonators. Plane wave expansion (PWE) and finite difference time domain (FDTD) methods have been use

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Kannaiyan, Venkatachalam, Sriram Kumar Dhamodharan, and Robinson Savarimuthu. "2D-Photonic Crystal based Demultiplexer for WDM Systems – A Review." Journal of Optical Communications, February 20, 2019. http://dx.doi.org/10.1515/joc-2018-0216.

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AbstractPhotonic crystals (PCs) have an excellent ability to confine and control the manipulation of light. PCs are periodic or aperiodic arrangement of dielectric, metallo dielectric or super conductor micro and nanostructure materials. The periodicity of refractive index distribution in one, two and three dimensions affects the propagation of electromagnetic waves inside the PC structure. As a result of periodicity, photonic band gap (PBG) exists in a specific wavelength of PC structure and reflects the beam of light through it. This is an active part to design optical devices with a specifi

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