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Journal articles on the topic 'Waveguide'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Kanaya, Yusho, Masashi Nakatsugawa, Tamami Maruyama, Manabu Omiya та Yasuhiro Tamayama. "FDTD Analysis on WPT Efficiency Between Circuit-Shape Leaky Waveguide and 𝝀/2 Dipole Antenna for Snow Melting Application". ELEKTRIKA- Journal of Electrical Engineering 21, № 2 (2022): 82–85. http://dx.doi.org/10.11113/elektrika.v21n2.409.

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The wireless transfer characteristics between a circuit-shape leaky waveguide and a /2 dipole antenna were analyzed with scattering parameters obtained with the FDTD method. The circuit-shaped leaky waveguide was composed of two pairs of straight slotted waveguides and two semicircular waveguides. The circuit-shape leaky waveguide was designed to achieve uniform electromagnetic field distribution with a source for snow melting with microwave radiations by microwave heating. The electromagnetic field of the circuit-shape leaky waveguide was firstly simulated with the FDTD method. Although the

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2

Poenar, Daniel Puiu, Jack Sheng Kee, Pavel Neuzil, and Levent Yobas. "The Design and Fabrication of Poly(dimethylsiloxane) Single Mode Rib Waveguides for Lab-on-a-Chip Applications." Advanced Materials Research 74 (June 2009): 51–54. http://dx.doi.org/10.4028/www.scientific.net/amr.74.51.

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This paper reports on the design and fabrication of Poly(dimethylsiloxane) (PDMS) single mode rib waveguide. PDMS was chosen as the base material for both the core and cladding of the waveguide. Such a PDMS waveguide allows an easy integration with microoptical components for lab-on-a-chip systems fabricated by soft lithography fabrication methods. The modification of the PDMS refractive index was achieved by diluting the base material with hexane. The fabricated PDMS rib waveguides were characterized for mode profile characteristics and the results confirmed the excitation of the waveguide's

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3

Runze, Wang, Jian Yabin, Yin Xiaofang, Hou YaQin, and Su XinMing. "Computer-aided Design for the Route of the Test Waveguides." MATEC Web of Conferences 179 (2018): 01022. http://dx.doi.org/10.1051/matecconf/201817901022.

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With the rapid development of China's space industry, digitization and intelligent is the tendency of the future. The applications of the waveguide are gradually widespread. During the thermal test phase, the routes of the test waveguides are similar for each spacecraft. Although the waveguides are highly standardized, so far it needs engineers to design the particular route of the test waveguidess, then map the engineering drawing for every test. In order to efficiently design the route of waveguide, it needs to design an application to help the engineers. With the help of the MFC(Microsoft F

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Ishibashi, Akira, Tsuyoshi Kasai, and Nobuo Sawamura. "Redirection Waveguide having Discrete Translational Symmetry for Photovoltaic Systems with Solar-Cell Units Placed at the Periphery." Energies 11, no. 12 (2018): 3498. http://dx.doi.org/10.3390/en11123498.

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We have investigated a new type of redirection waveguides for concentration solar-cell systems. The solar cell units are to be placed in the peripheral region of the waveguide. The redirection waveguide converts three-dimensionally propagating (3D) photons into 2D photons that propagate in a planar waveguide which serves as the mainstream of the redirection waveguide. In this new type, the cladding layer on one side of the planar waveguide, not being spatially continuous, tangentially touches the core of the planar waveguide which, having an open geometry, is connected, through tributary waveg

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5

Yu, Bo, Jie Yang, Yexi Song, et al. "Terahertz Metamaterial Waveguide with I-Shaped Resonators for Phase and Absorption Modulation." Photonics 10, no. 7 (2023): 816. http://dx.doi.org/10.3390/photonics10070816.

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In terahertz communication systems, amplifiers and other components can induce non-linear distortion in terms of amplitude and phase, resulting in system performance degradation. This paper presents a terahertz metamaterial waveguide to mitigate amplitude and phase distortions in some terahertz systems. A simple method based on free-space analysis is proposed for designing metamaterial waveguides in an enclosed space. The quasi-periodic metamaterial structures, which feature I-shaped resonant patterns, are integrated onto the inner walls of rectangular waveguides. The phase and amplitude of el

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Наливайко, В. И., та М. А. Пономарева. "Оптические решеточно-волноводные сенсоры на основе халькогенидных стекол". Журнал технической физики 126, № 4 (2019): 523. http://dx.doi.org/10.21883/os.2019.04.47523.182-18.

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AbstractThe operating principle of the optical grating waveguide sensors is considered. The waveguide sensitivity and detection limit of sensors with waveguides of oxide and chalcogenide glasses are compared. The advantages of the grating waveguide sensors with waveguides with a high contrast of refraction indices are shown. The conditions of obtaining a maximum waveguide sensitivity of the grating waveguide sensors are formulated.

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Feng, Song, and Bin Xue. "Research into Two Photonic-Integrated Waveguides Based on SiGe Material." Materials 13, no. 8 (2020): 1877. http://dx.doi.org/10.3390/ma13081877.

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SiGe (Silicon Germanium) is a common semiconductor material with many excellent properties, and many photonic-integrated devices are designed and fabricated with SiGe material. In this paper, two photonic-integrated SiGe waveguides are researched, namely the SiGe-SOI (Silicon Germanium-Silicon-On-Insulator) waveguide and the SiGe-OI (Silicon Germanium-On-Insulator) waveguide. In order to verify which structure has the better waveguide performance, two waveguide structures are built, and the effective refractive indexes and the loss characteristics of the two waveguides are analyzed and compare

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8

Maruyama, Tamami, Koki Shibata, Masashi Nakatsugawa1, et al. "Wireless Power Transmission Efficiency of Dipole Array Antenna using a Left-Handed Waveguide Slot Antenna as a Feeder." ELEKTRIKA- Journal of Electrical Engineering 21, no. 2 (2022): 86–89. http://dx.doi.org/10.11113/elektrika.v21n2.410.

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This paper proposes to transform microwaves for snow melting, which slightly leaking from the slotted waveguide, into electric power using a wireless power transmission technique for effective use. A combination of left-handed and right-handed waveguides is a method to melt snow evenly over a large area using microwaves. The left-handed waveguide, however, has large loss because of stubs. In order to evaluate the effect of the left-handed waveguide’s loss, this paper analyzed the wireless power transmission efficiency when the left-handed waveguide with a slot was set as the power transmission

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9

Liang, Zhi-Xun, Yun-Ying Shi, Qi-Ming Wu, Yun-Fei Yi, and Peng Tang. "Ultracompact Waveguide for an Optical Network-on-Chip with a Vacuum Gap Based on Surface Plasmon Polaritons." Journal of Nanoelectronics and Optoelectronics 18, no. 5 (2023): 565–71. http://dx.doi.org/10.1166/jno.2023.3421.

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In an optical network-on-chip, optical waveguides play a crucial role in transmitting optical signals. Therefore, it is essential for optical waveguides to have a compact size and low insertion loss. This paper proposes a new type of optical waveguide with a vacuum gap based on surface plasmon polaritons. By utilizing surface plasmon polariton technology, the proposed waveguide reduces scattering attenuation caused by hybrid surface plasmon polaritons, saves space in the network-on-chip, and enables the integration of more devices on the chip while maintaining an ultracompact size requirement.

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10

Deng, Jian Qin, Wan Shun Jiang, and Yue Min Ning. "Analysis and Design of a Novel High-Power W-Band Spatial Multilayer Doubler." Applied Mechanics and Materials 130-134 (October 2011): 529–33. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.529.

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A novel spatial multilayer doubler is proposed in the paper. It is designed by tray approach in rectangular waveguide. The doubler consists of multilayer multiplier circuits, which are parallel each other. Comparing with traditional single layer doubler, the spatial multilayer doubler has higher 1dB compression point, so the output power can be increased when input power is increased. Both the input port and the output port of the doubler are rectangular waveguides. In order to achieve the transition from rectangular waveguide to planar circuit, the finline and ridge are used. Multilayer finli

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11

Berdnik, Sergey L., Victor A. Katrich, Mikhail V. Nesterenko, and Yuriy M. Penkin. "Waveguide T-junctions with resonant coupling between sections of different dimensions." International Journal of Microwave and Wireless Technologies 9, no. 5 (2016): 1059–65. http://dx.doi.org/10.1017/s175907871600129x.

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Electromagnetic characteristics of the E-plane T-junction for two rectangular waveguides using resonant coupling between the waveguide sections were studied by mathematical modeling. The problem of coupling between infinite and semi-infinite rectangular waveguides through a resonant slot in the end-wall of the semi-infinite waveguide in the presence of resonant monopole is solved in a strict electrodynamic formulation. The monopole with variable surface impedance is placed parallel to the narrow walls at an arbitrary position inside the infinite waveguide. The problem is solved analytically by

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12

Gut, Kazimierz. "Study of a Broadband Difference Interferometer Based on Low-Cost Polymer Slab Waveguides." Nanomaterials 9, no. 5 (2019): 729. http://dx.doi.org/10.3390/nano9050729.

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A model and the waveguide parameters of a broadband, polymer-based slab waveguide difference interferometer is presented in this paper. The parameters were determined based on knowledge of the dispersion in the structure materials used to fabricate the waveguide. The impact of the waveguide layer thickness, propagation path length, and change in the waveguide cover refractive index on the output signal from the system was determined. It has been shown that the direction of the maximum shifting is determined by the thickness of the waveguide layer. A relationship describing the shift in the sig

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13

Krutskikh, V. V., A. Yu Sizyakova, M. S. Minkara, A. R. Ibrahim, A. E. Mirzoyan, and A. N. Ushkov. "Broadband Metal-Dielectric Waveguide Path with Low Losses in the EHF Range." Rocket-space device engineering and information systems 8, no. 3 (2021): 89–98. http://dx.doi.org/10.30894/issn2409-0239.2021.8.3.89.98.

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. The present paper is devoted to the design of a new shielded metal-dielectric waveguide with low losses (less than 0.5 dB/m) and wide bandwidth for the 90–100 GHz frequency range. Various types of waveguide structures were analyzed, such as metal waveguides, oversized metal waveguides, dielectric waveguides, dielectric waveguides with a metal shield and various designs of the dielectric filling element. Estimates of loss per unit length in them are obtained. The design of a waveguide containing an oversized round metal screen and a dielectric element consisting of a plate and a rod, located

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14

Bai, Jing, Jin Wang, Ji Li, et al. "Strip waveguides in Yb³⁺-doped silicate glass formed by combination of He⁺ ion implantation and precise ultrashort pulse laser ablation." Open Physics 20, no. 1 (2022): 1295–302. http://dx.doi.org/10.1515/phys-2022-0220.

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Abstract Strip optical waveguides were realized in Yb3+-doped silicate glass with ultrashort pulse laser ablation assisted He+ ion implantation. Planar waveguides were first prepared near the glass surface by He+ ion implantation (450 keV + 500 keV + 550 keV), followed by annealing at 260℃. After that, under the processing parameters of 3 μJ energy and 50 μm/s ablation velocity, two parallel tracks with separation of 15, 20, and 25 μm were, respectively, inscribed on the sample, which confine the light in lateral direction to form a strip waveguide. The near-field intensity measurement indicat

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15

KOUZAEV, GUENNADI A. "CONTROLLED LOCALIZED EIGENMODES IN PSEUDO-RANDOM MULTILAYER ELECTRON WAVEGUIDES." International Journal of Modern Physics B 28, no. 01 (2013): 1350192. http://dx.doi.org/10.1142/s0217979213501920.

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In this paper, the localization of eigenmodes in quasi-1-D pseudo-random potential lattice electron waveguides is studied using the equivalent circuit method applied to the Schrödinger equation. It is found that the mixed deterministic and random discrete potential and limited waveguide width allow only intermediate localization of modes, and their two main types are discovered: the gap-localized and random-lattice localized modes which are stable toward variation of the waveguide's geometry. These modes can be transformed to each other by proper choosing the waveguide parameters. The discover

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16

En, De, Jie Yu Feng, Ning Bo Zhang, Ning Ning Wang, and Xiao Bin Wang. "Research on Transmission Loss of Optical Waveguide in Three-Component Acceleration Seismic Geophone." Applied Mechanics and Materials 143-144 (December 2011): 644–48. http://dx.doi.org/10.4028/www.scientific.net/amm.143-144.644.

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The optical waveguides are produced in LiNbO3 substrate of three-component acceleration seismic geophone by lithography. Three-component acceleration seismic geophone detects changes in the external acceleration by detecting phase changes in the optical waveguides. The performance of optical waveguide directly affects the performance of three-component acceleration seismic geophone. Therefore, it is critical to measure and reduce the transmission loss of waveguides. The advantages and disadvantages of LiNbO3 crystal are introduced. The production process of Ti:LiNbO3 optical waveguide and its

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17

Koala, Ratmalgre, Ryoma Maru, Kei Iyoda, Li Yi, Masayuki Fujita, and Tadao Nagatsuma. "Ultra-Low-Loss and Broadband All-Silicon Dielectric Waveguides for WR-1 Band (0.75–1.1 THz) Modules." Photonics 9, no. 8 (2022): 515. http://dx.doi.org/10.3390/photonics9080515.

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This study presents ultra-low-loss and broadband all-silicon dielectric waveguides for the WR-1 band (0.75–1.1 THz). The waveguides are built in high-resistivity silicon (10 kΩ-cm) and integrated with supportive frames fabricated from the same silicon wafer in a single etch process to achieve a compact design. We pursued low-loss, broadband, substrateless, unclad and effective medium waveguides. Smaller propagation losses of 0.3 dB/cm and 0.1 dB/cm were achieved for the unclad and effective medium waveguides, respectively. The 3 dB bandwidth was not encountered in the frequency range of intere

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18

Tyszkiewicz, Cuma, and Paweł Kielan. "Evanescent Wave Sensitivity of Silica-Titania Rib Waveguides in the Single-Mode Propagation Regime." Photonics 10, no. 9 (2023): 1065. http://dx.doi.org/10.3390/photonics10091065.

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The analysis reported in this paper shows that the homogeneous sensitivity of both fundamental rib waveguide modes, HE00 and EH00, can slightly exceed the sensitivity of the optimized parent slab waveguide. The most crucial difference in the behavior of these two polarizations is that the sensitivity of the HE00 mode is the maximum for strip waveguides. In contrast, the sensitivity of the EH00 mode can either decrease monotonically or not-monotonically with increasing rib height or behave like a homogeneous sensitivity characteristic of the slab waveguide’s EH0 mode. The second important concl

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19

Hubert, Florian, Tobias Bader, Larissa Wahl, et al. "Additive Manufactured Waveguide for E-Band Using Ceramic Materials." Applied Sciences 12, no. 1 (2021): 212. http://dx.doi.org/10.3390/app12010212.

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Ceramic materials are chemical- and temperature-resistant and, therefore, enable novel application fields ranging from automotive to aerospace. With this in mind, this contribution focuses on developing an additive manufacturing approach for 3D-printed waveguides made of ceramic materials. In particular, a special design approach for ceramic waveguides, which introduces non-radiating slots into the waveguides sidewalls, and a customized metallization process, are presented. The developed process allows for using conventional stereolithographic desktop-grade 3D-printers. The proposed approach h

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20

YOON, KEUN BYOUNG, BYEONG-SOO BAE, and MICHAEL POPALL. "FABRICATION OF LOW-LOSS WAVEGUIDES USING ORGANIC-INORGANIC HYBRID MATERIALS." Journal of Nonlinear Optical Physics & Materials 14, no. 03 (2005): 399–407. http://dx.doi.org/10.1142/s0218863505002852.

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The fabrication of single and multimode waveguides and optical characteristics were investigated. The singlemode waveguide was fabricated by a laser direct writing technique and a multimode waveguide was produced by means of a direct UV patterning technique using organic-inorganic hybrid materials. The fabrication of waveguide channels with these techniques are of interest for simple processes. The resulting single and multimode waveguides exhibited a near rectangular shape and low optical loss. The average propagation losses of these waveguides were 0.07 dB/cm (at 850 nm) and 0.3 dB/cm (at 13

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21

Bobby, Barua, Newaz Chowdhury Kasib, Mohammad Hasan Sharif, et al. "Low Index Silicon Photonic Directional Coupler: Design and Characterization." Journal of Optoelectronics and Communication 4, no. 1 (2022): 1–20. https://doi.org/10.5281/zenodo.6635593.

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<em>An optical waveguide is a physical structure that guides electromagnetic waves in the optical spectrum. Generally, the bandwidth of an optical fiber can be divided into as many as 160 channels. For study without difficult we’ve simulated using only one signal through a waveguide. In a differential coupler circuit, a certain index difference is used. But as the index difference become higher, the overall device become thicker and fragile. Also, the signals those pass through a waveguide can cause cross-talk, scattering, wall roughness, mode mismatch, and other factors. The goal of thi

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Chandra, Veer, and Rakesh Ranjan. "Design and Analysis of Micro-Opto-Mechanical System Cantilever Integrated with Photonics Waveguide for Pressure Sensing Applications." Sensor Letters 18, no. 1 (2020): 18–25. http://dx.doi.org/10.1166/sl.2020.4178.

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In this work, the pressure sensing approach based on the Micro-Opto-Mechanical System (MOMS) cantilever integrated with waveguide structure has been explored. The MOMS based photonic sensors are drawing attention because of their high sensing capabilities. In the design of MOMS based cantilever pressure sensor, mainly two different waveguide structures, Rib and Slot waveguides have been considered. The deviation in light intensity at the output of the waveguide structure is mainly used to analyze the amount of exerted pressure at the free-end of cantilever. Using the different waveguide parame

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23

Milosevic, Milan, Petar Matavulj, and Goran Mashanovich. "Single mode and polarization independence in the strained silicon-on-insulator rib waveguides." Chemical Industry 62, no. 3 (2008): 119–24. http://dx.doi.org/10.2298/hemind0803119m.

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In this paper we investigate the most popular silicon waveguide structures in the form of a silicon-on-insulator (SOI) rib waveguide. Single mode and birefringence free conditions in these relatively small waveguides are discussed and the influence of the top oxide cladding stress is analyzed. Field profiles for a wide range of waveguide cross section shapes and dimensions are systematically considered. Design guidelines for this type of SOI waveguides are presented.

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Schädle, Thomas, and Boris Mizaikoff. "Mid-Infrared Waveguides: A Perspective." Applied Spectroscopy 70, no. 10 (2016): 1625–38. http://dx.doi.org/10.1177/0003702816659668.

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Significant advancements in waveguide technology in the mid-infrared (MIR) regime during recent decades have assisted in establishing MIR spectroscopic and sensing technologies as a routine tool among nondestructive analytical methods. In this review, the evolution of MIR waveguides along with state-of-the-art technologies facilitating next-generation MIR chem/bio sensors will be discussed introducing a classification scheme defining three “generations” of MIR waveguides: (1) conventional internal reflection elements as “first generation” waveguides; (2) MIR-transparent optical fibers as “seco

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Yu, Zejie, He Gao, Yi Wang, et al. "Fundamentals and applications of photonic waveguides with bound states in the continuum." Journal of Semiconductors 44, no. 10 (2023): 101301. http://dx.doi.org/10.1088/1674-4926/44/10/101301.

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Abstract Photonic waveguides are the most fundamental element for photonic integrated circuits (PICs). Waveguide properties, such as propagation loss, modal areas, nonlinear coefficients, etc., directly determine the functionalities and performance of PICs. Recently, the emerging waveguides with bound states in the continuum (BICs) have opened new opportunities for PICs because of their special properties in resonance and radiation. Here, we review the recent progress of PICs composed of waveguides with BICs. First, fundamentals including background physics and design rules of a BIC-based wave

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Čehovski, Marko, Jing Becker, Ouacef Charfi, Hans-Hermann Johannes, Claas Müller, and Wolfgang Kowalsky. "Single-Mode Polymer Ridge Waveguide Integration of Organic Thin-Film Laser." Applied Sciences 10, no. 8 (2020): 2805. http://dx.doi.org/10.3390/app10082805.

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Organic thin-film lasers (OLAS) are promising optical sources when it comes to flexibility and small-scale manufacturing. These properties are required especially for integrating organic thin-film lasers into single-mode waveguides. Optical sensors based on single-mode ridge waveguide systems, especially for Lab-on-a-chip (LoC) applications, usually need external laser sources, free-space optics, and coupling structures, which suffer from coupling losses and mechanical stabilization problems. In this paper, we report on the first successful integration of organic thin-film lasers directly into

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Weeber, Jean-Claude, Gérard Colas-des-Francs, Alexandre Bouhelier, et al. "Colloidal quantum dots decorated micro-ring resonators for efficient integrated waveguides excitation." Nanophotonics 9, no. 6 (2020): 1411–23. http://dx.doi.org/10.1515/nanoph-2019-0516.

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AbstractMicro-ring resonators made of titanium dioxide were decorated with local light sources comprising CdSe/CdS colloidal quantum dot aggregates. The active micro-resonators are operated to achieve efficient evanescent excitation of nearby co-planar integrated waveguides. Coupled-mode analysis and numerical simulations are used to capture the dynamic of the optical interaction between locally activated resonators and integrated waveguides. In this context, we exemplify the key role of resonator intrinsic loss. Next, we show that locally activated or bus-waveguide excited resonators are in o

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28

Baiocco, Davide, Ignacio Lopez-Quintas, Javier R. Vázquez de Aldana, Mauro Tonelli, and Alessandro Tredicucci. "Comparative Performance Analysis of Femtosecond-Laser-Written Diode-Pumped Pr:LiLuF4 Visible Waveguide Lasers." Photonics 10, no. 4 (2023): 377. http://dx.doi.org/10.3390/photonics10040377.

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In this work, we present the operation of a femtosecond-laser-written diode-pumped visible waveguide laser based on praseodymium-doped lithium lutetium fluoride. The refractive index modification induced by the femtosecond laser in the crystal exhibits an anisotropic behavior, thus enabling the fabrication of different types of waveguides from single-track structures to stress-induced waveguides and depressed cladding structures. All the waveguides were characterized by realizing transmission measurements and the waveguide design was optimized to obtain extremely low propagation losses, equal

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Renno, Jamil, Niels Søndergaard, Sadok Sassi, and Mohammad R. Paurobally. "Wave Scattering and Power Flow in Straight-Helical-Straight Waveguide Structure." International Journal of Applied Mechanics 11, no. 08 (2019): 1950075. http://dx.doi.org/10.1142/s1758825119500753.

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The knowledge of wave scattering and power flow in waveguide structures is important for many engineering applications. In this paper, power flow and scattering in a straight-helical-straight waveguide structure are investigated using the wave and finite element (WFE) method. For simple (straight or helical) waveguides, wave scattering (and subsequently the power flow and scattering) can be resolved analytically. This is not the case for complex waveguides such as laminated or sandwiched waveguides or waveguides with noncanonical cross-sections. In such cases, the WFE method is used to model t

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Wang, Way-Seen, Yu-Pin Liao, and Chih-Hua Yang. "Nickel-Indiffusion Waveguide for TE-TM Mode Splitter in Lithium Niobate." International Journal of High Speed Electronics and Systems 08, no. 04 (1997): 621–42. http://dx.doi.org/10.1142/s012915649700024x.

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Optical waveguides fabricated by nickel indiffusion on lithium niobate are reviewed. In particular, the fabrication process, index change versus concentration, wavelength dispersion, process-dependent polarization, propagation loss, and electro-optic modulation of the nickel indiffusion waveguide are discussed. To improve the confinement of single-ordinary polarization waveguide fabricated by nickel indiffusion, a novel waveguide made by zinc and nickel indiffusion is presented for the first time. Though the measured propagation loss of the waveguide is larger, the measured output power contou

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Helke, Christian, Markus Reinhardt, Markus Arnold, et al. "On the Fabrication and Characterization of Polymer-Based Waveguide Probes for Use in Future Optical Cochlear Implants." Materials 16, no. 1 (2022): 106. http://dx.doi.org/10.3390/ma16010106.

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Improved hearing restoration by cochlear implants (CI) is expected by optical cochlear implants (oCI) exciting optogenetically modified spiral ganglion neurons (SGNs) via an optical pulse generated outside the cochlea. The pulse is guided to the SGNs inside the cochlea via flexible polymer-based waveguide probes. The fabrication of these waveguide probes is realized by using 6” wafer-level micromachining processes, including lithography processes such as spin-coating cladding layers and a waveguide layer in between and etch processes for structuring the waveguide layer. Further adhesion layers

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Davidovich M. V. "Volumetric integro-differential equations in diffraction and eigenvalue problems (r e v i e w)." Optics and Spectroscopy 130, no. 10 (2022): 1263. http://dx.doi.org/10.21883/eos.2022.10.54863.3231-22.

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Volumetric integral and integro-differential equations are considered that describe problems of diffraction by three-dimensional bodies with given macroscopic permittivity and magnetic permeability, as well as problems on free vibrations of such bodies. Similar equations are obtained for waveguide structures: hollow shielded waveguides with dielectric filling, dielectric waveguides (optical beamguides), photonic-crystal waveguides. Dominantly stationary linear electromagnetic problems are considered. Non-stationary and nonlinear problems are mentioned casually. Numerical results are given for

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De Boeij, Wim P., Hans S. Kanger, Gerald W. Lucassen, Cees Otto, and Jan Greve. "Waveguide CARS Spectroscopy: A New Method for Background Suppression, Using Dielectric Layers as a Model." Applied Spectroscopy 47, no. 6 (1993): 723–30. http://dx.doi.org/10.1366/0003702934066938.

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Waveguide Coherent Anti-Stokes Raman Spectroscopy (CARS) can be used to measure Raman-active vibrations in thin-layer dielectric waveguides. In waveguide CARS experiments, background-free spectra can be obtained when asymmetric mode combinations are applied. The degree of suppression depends on the waveguide parameters and the wavelengths used. A new method using scanning pump and Stokes beams in waveguide CARS experiments is presented, which allows the possibility of maintaining full background suppression conditions over large spectral intervals. A small controlled change in the tuning condi

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Cammarata, Simone, Andrea Fontana, Ali Emre Kaplan, et al. "Polarization Control in Integrated Graphene-Silicon Quantum Photonics Waveguides." Materials 15, no. 24 (2022): 8739. http://dx.doi.org/10.3390/ma15248739.

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We numerically investigated the use of graphene nanoribbons placed on top of silicon-on-insulator (SOI) strip waveguides for light polarization control in silicon photonic-integrated waveguides. We found that two factors mainly affected the polarization control: the graphene chemical potential and the geometrical parameters of the waveguide, such as the waveguide and nanoribbon widths and distance. We show that the graphene chemical potential influences both TE and TM polarizations almost in the same way, while the waveguide width tapering enables both TE-pass and TM-pass polarizing functional

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Vostrikov, Gavril N., Nikolay V. Muravyev, Aleksandr E. Angervaks, et al. "Method for Compensating Aberrations of a Virtual Image Formed by an Augmented Reality Display Based on a Cylindrical Diffractive Waveguide." Applied Sciences 13, no. 4 (2023): 2400. http://dx.doi.org/10.3390/app13042400.

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To date, planar waveguides are under development for augmented reality systems with waveguide combiners. The next step of their development is the transition to curved waveguides, which could make the combiners more ergonomic. In the present work, a method has been developed that makes it possible to minimize aberrations of a virtual image during its in-coupling to and out-coupling from a cylindrical waveguide. The method is based on the use of in-coupling and out-coupling diffractive optical elements (DOE) with a variable grating period, which provide virtual image pre-aberration when radiati

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White, Rachel H., and Lualawi Mareshet Admasu. "Temporally and zonally varying atmospheric waveguides – climatologies and connections to quasi-stationary waves." Weather and Climate Dynamics 6, no. 2 (2025): 549–70. https://doi.org/10.5194/wcd-6-549-2025.

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Abstract. Atmospheric waveguides have been linked to amplified quasi-stationary Rossby waves and thus to extreme weather events in the mid-latitudes. Here, we compare different methods of calculating temporally and spatially varying waveguides, including different ways of separating the waveguides (background flow) from waves. We compare waveguides from potential vorticity (PV) gradients (“PV waveguides”) with barotropic waveguides based on what is known as the stationary wavenumber, or KS (“KS waveguides”), which is calculated from the zonal wind. The PV waveguides use a PV rolling-zonalizati

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Pochernyaev, Vitaly, Nataliia Syvkova, and Mariia Mahomedova. "POLARIZATION SELECTOR ON WAVEGUIDES PARTIALLY FILLED BY DIELECTRIC." Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska 14, no. 4 (2024): 28–31. https://doi.org/10.35784/iapgos.6340.

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In this article, a polarization selector, which based on waveguides partially filled by dielectric has been developed and investigated. An analysis of the designs of polarization selectors on empty waveguides was carried out. The developed design of the polarization selector is based on square waveguides partially filled by dielectric in the form of an E-tee. The main and side waveguides of the E-tee include metal gratings with mutually perpendicular conductors. The dielectric plates have a square cross-section and extend between the second and third conductors of metal grids, which located in

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Boudjemline, Attia, David T. Clarke, Neville J. Freeman, James M. Nicholson, and Gareth R. Jones. "Early stages of protein crystallization as revealed by emerging optical waveguide technology." Journal of Applied Crystallography 41, no. 3 (2008): 523–30. http://dx.doi.org/10.1107/s0021889808005098.

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A highly sensitive method for studying the onset of protein crystallization in real time using an optical-waveguide-based technique is reported. Dual polarization interferometry uses light from sensing and reference waveguides to produce an interference pattern, which when the sensing waveguide is immersed in a protein solution supplies information on the thickness and density of any protein adlayer on the sensing waveguide's surface. This technique provides evidence that crystallization proceedsvialarge protein aggregates but, more strikingly, shows dramatic light loss from the sensing wavegu

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Thi, Ha Trinh, Duong Nguyen Van, Hieu Dang Van, and Hoang Manh Chu. "Tunable Characteristics of Wedge Plasmonic Waveguide with Thin Metallic Layers." Photonics 11, no. 9 (2024): 842. http://dx.doi.org/10.3390/photonics11090842.

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In this study, we propose a mechanism for tuning the modal characteristics of a wedge plasmonic waveguide. The wedge plasmonic waveguide is composed of a thin metallic layer deposited on a wedge-shaped dielectric waveguide. The tuning mechanism is based on controlling the surface plasmon polariton (SPP) mode at the interface between the metal layer and the dielectric waveguide instead of controlling the SPP mode at the interface between the wedge-shaped metal layer and the surrounding media. This mechanism is performed by modulating the effective refractive index of the dielectric waveguide us

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Egorov, E. V., and V. K. Egorov. "Optical fluxes propagation in the planar transport layer of multilayer coatings." Journal of Physics: Conference Series 2144, no. 1 (2021): 012013. http://dx.doi.org/10.1088/1742-6596/2144/1/012013.

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Abstract The article is concerned with peculiarities study of the quasimonochromatic optical fluxes propagation through thin planar transparent layer of multilayer coating. There is shown that these fluxes can be transported by the layer in process of its multiple consequtive total internal reflection or by the waveguide-resonance propagation manner depending on correlation between the layer width and the radiation coherence length half of transported fluxes. Efficiency comparison of these radiation transportation mechanisms showed that the waveguide-resonance propagation approach is more adeq

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Bessonov, V. O., A. D. Rozanov, and A. A. Fedyanin. "Optical Trapping and Moving of Microparticles by the Near Field of Bloch Surface Waves in Polymer Waveguides." JETP Letters 119, no. 4 (2024): 261–66. http://dx.doi.org/10.1134/s0021364024600010.

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Trapping and movement of microparticles using the near field of waveguide modes enables the realization of stable and compact integrated optical platforms for manipulating, sorting, and studying single microobjects. In this work, the possibility of optical manipulation via Bloch surface waves propagating in polymer waveguides on the surface of a one-dimensional photonic crystal and localizing light at the waveguide surface is studied. Numerical simulation of optical forces acting on a spherical particle from the fundamental waveguide mode of the Bloch surface wave is performed. Using two-photo

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Ali, Md Shuzon, Yusuke Hata, Motoki Kataoka, Masaaki Misawa, and Kenji Tsuruta. "Robust and Reconfigurable Waveguide Design in Valley-Topological Phononic Crystals." Materials Science Forum 1107 (December 6, 2023): 141–45. http://dx.doi.org/10.4028/p-jt9zkn.

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As an analogy of topological insulators and superconductors, “topological phononics”, which applies the concept of band topology to acoustic dispersion, has attracted increasing attention in recent years. We present design of topological acoustic/elastic waveguides in phononic crystals. Topological waveguides are designed from the phonon dispersion analyses by finding edge modes appearing at interfaces between phononic crystals with different band topologies. As a prototype model, we first designed the topological waveguides in kHz regimes. Experimental validation of the designed waveguide has

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Kanjwal, Muzafar A., and Amal Al Ghaferi. "Advanced Waveguide Based LOC Biosensors: A Minireview." Sensors 22, no. 14 (2022): 5443. http://dx.doi.org/10.3390/s22145443.

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This mini review features contemporary advances in mid-infrared (MIR) thin-film waveguide technology and on-chip photonics, promoting high-performance biosensing platforms. Supported by recent developments in MIR thin-film waveguides, it is expected that label-free assimilated MIR sensing platforms will soon supplement the current sensing technologies for biomedical diagnostics. The state-of-the-art shows that various types of waveguide material can be utilized for waveguide spectroscopic measurements in MIR. However, there are challenges to integrating these waveguide platforms with microflui

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Shi, Jia, Yiyun Ding, Longhuang Tang, et al. "Low-Frequency Terahertz Photonic Crystal Waveguide with a Lilac-Shaped Defect Based on Stereolithography 3D Printing." Applied Sciences 12, no. 16 (2022): 8333. http://dx.doi.org/10.3390/app12168333.

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Terahertz (THz) photonic crystal (PC) waveguides show promise as an efficient and versatile waveguiding platform for communication, sensing, and imaging. However, low-frequency THz PC waveguides with a low-cost and easy fabrication remain challenging. To address this issue, a THz PC waveguide with a lilac-shaped defect has been designed and fabricated by 3D printing based on stereolithography (SLA). The reflection and transmission characteristics of the proposed waveguide have been analyzed using the finite difference frequency domain (FDFD) method. The waveguide spectral response is further o

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Aziz, Asad. "Novel ELC-like and Z-shaped plasmonic waveguides to reach ultra-strong field confinements." Laser Physics 32, no. 4 (2022): 046204. http://dx.doi.org/10.1088/1555-6611/ac5817.

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Abstract In this paper, two novel waveguides with ELC like-shaped and Z-shaped grooves have been proposed to achieve highly efficient and strongly confined spoof surface plasmon polaritons (SSPPs) propagation. Low-dispersion bands can be realized by such structures with tight field confinement of SSPPs, resulting in size miniaturization of the proposed waveguides. Specifically, our method yields deep physical insight into the effect that the geometrically induced modifications of the supporting structure has on the dispersion properties and field confinement capabilities of SSPPs. In compariso

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Savotchenko, S. E. "Models of waveguides combining gradient and nonlinear optical layers." Russian Technological Journal 11, no. 4 (2023): 84–93. http://dx.doi.org/10.32362/2500-316x-2023-11-4-84-93.

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Objectives. Theoretical studies of the waveguide properties of interfaces between nonlinear optical and graded-index media are important for application in optoelectronics. Waveguides combining layers with different optical properties seem to be the most promising, since they can be matched to optimal characteristics using a wide range of control parameters. The paper aims to develop a theory of composite optically nonlinear gradedindex waveguides with an arbitrary profile, within which it is possible to obtain exact analytical expressions for surface waves and waveguide modes in an explicit f

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Alatwi, Aadel M., and Ahmed Nabih Zaki Rashed. "An analytical method with numerical results to be used in the design of optical slab waveguides for optical communication system applications." Indonesian Journal of Electrical Engineering and Computer Science 21, no. 1 (2021): 278–86. https://doi.org/10.11591/ijeecs.v21.i1.pp278-286.

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This study develops an analytical method with numerical results for the design of optical slab waveguides for optical communication system applications. An optical slab waveguide structure made of silicon on silicon dioxide material is designed and analyzed. The effective index of the mode is studied against variations in the waveguide dimensions. Transmission and reflection coefficients are studied and compared to the wavelength and dimensions of the waveguide. Variations are sketched with the x-axis, in addition to the electric field intensity distribution and effective refractive index. Wav

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Zeng, Desheng, Qiang Liu, Chenyang Mei, Hongwei Li, Qingzhong Huang, and Xinliang Zhang. "Demonstration of Ultra-High-Q Silicon Microring Resonators for Nonlinear Integrated Photonics." Micromachines 13, no. 7 (2022): 1155. http://dx.doi.org/10.3390/mi13071155.

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A reflowing photoresist and oxidation smoothing process is used to fabricate ultra-high-Q silicon microring resonators based on multimode rib waveguides. Over a wide range of wavelengths near 1550 nm, the average Q-factor of a ring with 1.2-μm-wide waveguides reaches up to 1.17 × 106, with a waveguide loss of approximately 0.28 dB/cm. For a resonator with 1.5-μm-wide waveguides, the average Q-factor reaches 1.20 × 106, and the waveguide loss is 0.27 dB/cm. Moreover, we theoretically and experimentally show that a reduction in the waveguide loss significantly improves the conversion efficiency

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Lin, Kai-Ju, and Lon A. Wang. "Investigation of an In-Line Slot Waveguide Sensor Built in a Tapered D-Shaped Silicon-Cored Fiber." Sensors 21, no. 23 (2021): 7832. http://dx.doi.org/10.3390/s21237832.

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An in-line slot waveguide sensor built in a polished flat platform of a D-shaped silicon cored fiber with a taper coupled region is proposed and investigated thoroughly. Simulation results show that the single-mode light field sustained in the silicon cored fiber can be efficiently transferred to the slot waveguides through the tapered region. The geometry parameters of the slot waveguide sensors are optimized to have the corresponding highest power confinement factors and the resultant sensor sensitivities. The three-slot waveguide sensor is found to have the best performance among one-, two-

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Samanta, Swagata, Pallab Banerji, and Pranabendu Ganguly. "Focused Ion Beam Fabrication of SU-8 Waveguide Structures on Oxidized Silicon." MRS Advances 2, no. 18 (2017): 981–86. http://dx.doi.org/10.1557/adv.2017.89.

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ABSTRACTThis work deals with SU-8 waveguides and waveguide structures fabricated on an oxidized silicon substrate using ‘Focused ion beam (FIB) lithography’. From our experimentation it seems that FIB method is practically not suitable for fabricating long SU-8 waveguide structures, rather it is more suitable for nanoscale modification of already fabricated waveguides, such as, to fabricate photonic crystal structures.

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