Log in

Relevant bibliographies by topics / Grating Design / Journal articles

To see the other types of publications on this topic, follow the link: Grating Design.

Journal articles on the topic 'Grating Design'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Grating Design.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Zhang, Guo Sheng, and Yan Xu. "Optimization Design of Cylinder Grating Used for Non-Contact Speed Measurement." Applied Mechanics and Materials 312 (February 2013): 95–100. http://dx.doi.org/10.4028/www.scientific.net/amm.312.95.

Full text

Abstract:

In order to realize the detection of diffractive light after the image segmentation using cylinder grating, the parameters of a cylinder grating was optimized using the wave optics theory. By analyzing the relation of optical path length variation with the diffraction angle of single cylinder lens diffraction, and by Fraunhofer approximation, the analytical expressions of cylinder lens diffraction was given. By setting parameters to calculate and simulate, it was found that to increase the ratio of curvature radius and grating period could effectively reduce the spatial distribution of the dif

APA, Harvard, Vancouver, ISO, and other styles

2

Kim, Woo Jae, Yuki Shimizu, Koji Hosono, So Ito, and Wei Gao. "Design and Test of a Three-Axis Mosaic Surface Encoder." Key Engineering Materials 523-524 (November 2012): 919–24. http://dx.doi.org/10.4028/www.scientific.net/kem.523-524.919.

Full text

Abstract:

A three-axis mosaic surface encoder, which can measure the X-directional position and the Y-, Z-directional straightness of the linear stage in a long range, is proposed. The three-axis mosaic surface encoder is composed of multiple scanning probes and a mosaic scale grating. The mosaic scale grating is constructed by placing the multiple two-dimensional reflective-type scale gratings in a line to obtain long measurement range along the in-plane direction of a scale grating. In addition, the optical configuration of the encoder head, which employs multiple scanning probes to be projected on th

APA, Harvard, Vancouver, ISO, and other styles

3

Babu, Sachin, and Jeong-Bong Lee. "Axially-Anisotropic Hierarchical Grating 2D Guided-Mode Resonance Strain-Sensor." Sensors 19, no. 23 (2019): 5223. http://dx.doi.org/10.3390/s19235223.

Full text

Abstract:

Guided-mode resonance strain sensors are planar binary gratings that have fixed resonance positions and quality factors decided by material properties and grating parameters. If one is restricted by material choices, the quality factor can only be improved by adjusting the grating parameters. We report a new method to improve quality factor by applying a slotting design rule to a grating design. We investigate this design rule by first providing a theoretical analysis on how it works and then applying it to a previously studied 2D solid-disc guided-mode resonance grating strain sensor design t

APA, Harvard, Vancouver, ISO, and other styles

4

Li, Xing Hui, Yuki Shimizu, Hiroshi Muto, So Ito, and Wei Gao. "Design of a Three-Axis Surface Encoder with a Blue-Ray Laser Diode." Key Engineering Materials 523-524 (November 2012): 913–18. http://dx.doi.org/10.4028/www.scientific.net/kem.523-524.913.

Full text

Abstract:

A compact optical three-axis surface encoder, which can detect displacements in the XYZ-directions simultaneously by employing a scale grating with a short pitch (0.57 μm) and a single laser beam with a short wavelength (405 nm), is described in this paper. This surface encoder mainly consists of a blue-ray laser diode, a pair of two-dimensional diffractive gratings serving as scale grating and reference grating, respectively, and two quarter photodiodes (QPD) utilized for detecting output optical density. The displacements of the scale grating along X-, Y- and Z-directions are measured by ana

APA, Harvard, Vancouver, ISO, and other styles

5

Zhai, Tianrui, Liang Han, Xiaojie Ma, and Xiaolei Wang. "Low-Threshold Microlasers Based on Holographic Dual-Gratings." Nanomaterials 11, no. 6 (2021): 1530. http://dx.doi.org/10.3390/nano11061530.

Full text

Abstract:

Among the efforts to improve the performances of microlasers, optimization of the gain properties and cavity parameters of these lasers has attracted significant attention recently. Distributed feedback lasers, as one of the most promising candidate technologies for electrically pumped microlasers, can be combined with dual-gratings. This combination provides additional freedom for the design of the laser cavity. Here, a holographic dual-grating is designed to improve the distributed feedback laser performance. The holographic dual-grating laser consists of a colloidal quantum dot film with tw

APA, Harvard, Vancouver, ISO, and other styles

6

Wang, Bowen, Yi Zhou, Zhihe Guo, and Xiang Wu. "Design for Distributed Feedback Laser Biosensors Based on the Active Grating Model." Sensors 19, no. 11 (2019): 2569. http://dx.doi.org/10.3390/s19112569.

Full text

Abstract:

The distributed feedback (DFB) laser is widely used in sensing because of its portable size, simple fabrication and high sensitivity. Most theoretical design models are based on passive Bragg gratings. However, passive grating models cannot be used to predict sensor performance using the important indicator of figure of merit (FOM) through theoretical calculations. To solve this problem, we replaced the passive grating with an active grating by using the imaginary part of the coupling constant that represents the value of the gain. As a comparison, the influence of the full width at half maxim

APA, Harvard, Vancouver, ISO, and other styles

7

Nambiar, Siddharth, Purnima Sethi, and Shankar Selvaraja. "Grating-Assisted Fiber to Chip Coupling for SOI Photonic Circuits." Applied Sciences 8, no. 7 (2018): 1142. http://dx.doi.org/10.3390/app8071142.

Full text

Abstract:

Fiber to chip coupling is a critical aspect of any integrated photonic circuit. In terms of ease of fabrication as well as wafer-scale testability, surface grating couplers are by far the most preferred scheme of the coupling to integrated circuits. In the past decade, considerable effort has been made for designing efficient grating couplers on Silicon-on-Insulator (SOI) and other allied photonic platforms. Highly efficient grating couplers with sub-dB coupling performance have now been demonstrated. In this article, we review the recent advances made to develop grating coupler designs for a

APA, Harvard, Vancouver, ISO, and other styles

8

Yu, W., D. Wu, X. Duan, and Y. Yi. "Subwavelength grating wideband reflectors with tapered sidewall profile." MRS Advances 1, no. 23 (2015): 1683–91. http://dx.doi.org/10.1557/adv.2015.18.

Full text

Abstract:

AbstractOne main difference between practical device and ideal design for subwavelength grating structure is the tapered sidewall profile of grating, which is normally obtained by the practical CMOS-compatible fabrication and etching process. Our work has investigated the impacts of tapered sidewall profile on the subwavelength grating wideband reflector characteristics. Both zero-contrast gratings (ZCG) and high- contrast gratings (HCG) are numerically investigated in detail and the results show a distinct differences of the impacts of tapered sidewall profile of grating. The simulation resul

APA, Harvard, Vancouver, ISO, and other styles

9

Millett, Ronald, Jamie Ramsey, Przemek Bock, et al. "Synthesis of Planar Reflective Gratings for Silicon Interconnects." Advances in Optical Technologies 2008 (May 21, 2008): 1–8. http://dx.doi.org/10.1155/2008/315724.

Full text

Abstract:

The design and simulations of planar reflective gratings for building optical interconnects in silicon-on-insulator (SOI) were studied for a range of silicon core thicknesses of 0.1 to 10 μm. The verticality of the grating facets has been shown to be the main contributing factor to the cumulative crosstalk in thick silicon cores. The dispersion property of the slab was found to limit the minimal thickness of the core for polarization-insensitive gratings. The effects of polarization-dependent confinement on optical crosstalk were studied. The findings were used to design and simulate a polariz

APA, Harvard, Vancouver, ISO, and other styles

10

Wen, Han, Andrew A. Gomella, Ajay Patel, et al. "Boosting phase contrast with a grating Bonse–Hart interferometer of 200 nanometre grating period." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 372, no. 2010 (2014): 20130028. http://dx.doi.org/10.1098/rsta.2013.0028.

Full text

Abstract:

We report on a grating Bonse–Hart interferometer for phase-contrast imaging with hard X-rays. The method overcomes limitations in the level of sensitivity that can be achieved with the well-known Talbot grating interferometer, and without the stringent spectral filtering at any given incident angle imposed by the classic Bonse–Hart interferometer. The device operates in the far-field regime, where an incident beam is split by a diffraction grating into two widely separated beams, which are redirected by a second diffraction grating to merge at a third grating, where they coherently interfere.

APA, Harvard, Vancouver, ISO, and other styles

11

Zhiwen, Wang, Gong Jinliang, Dong Aimei, and Cui Bo. "Mechanism analyzation of the effects of grating parameters on polarization transmission of single-layer nanowire gratings." Proceedings of the Institution of Mechanical Engineers, Part N: Journal of Nanomaterials, Nanoengineering and Nanosystems 232, no. 1 (2017): 41–47. http://dx.doi.org/10.1177/2397791417744966.

Full text

Abstract:

Using equivalent medium theory, surface plasma resonance theory and Fabry–Pérot resonance theory, transmission mechanism of single-layer nanowire polarizer is systematically analyzed. Concept of skin depth is used to explain the effect of grating material on polarization transmission. Two transmission minimum points in the curve of grating period versus transverse magnetic transmission are analyzed quantitatively. Effects of grating duty cycle, height and type on polarization transmission of single-layer nanowire polarizer are also analyzed. The requirements of designing single-layer sub-wavel

APA, Harvard, Vancouver, ISO, and other styles

12

Lubov, Maxim, and Leonid Goray. "High-efficiency X-ray multilayer-coated blazed gratings with shifted boundaries." Journal of Synchrotron Radiation 26, no. 5 (2019): 1539–45. http://dx.doi.org/10.1107/s1600577519006337.

Full text

Abstract:

A new design for a high-efficiency multilayer-coated blazed X-ray grating with horizontal-shifted (non-conformal) boundary profiles is proposed. The investigation of the grating design is carried out using an integrated approach based on rigorous numerical calculations of light diffraction by gratings with realistic boundary profiles obtained from simulations of multilayer grating growth. By varying the incidence angle of the deposition flux, one can set the direction and magnitude of the boundary profile shifts over a wide range of values. It is shown that the diffraction efficiency of the bl

APA, Harvard, Vancouver, ISO, and other styles

13

Jalali, Mandana, Hamid Nadgaran, and Daniel Erni. "Semiperiodic Ultra-Broadband Double-Grating to Improve c-Si Thin-Film Solar Cell’s Optical Absorption, through Numerical Structural Optimization." Crystals 9, no. 5 (2019): 264. http://dx.doi.org/10.3390/cryst9050264.

Full text

Abstract:

Plasmonic gratings provide effective photon management techniques in thin-film solar cells, capable of extending the optical thickness of the solar cell’s active layer. However, the ultra-broadband nature of such application makes an optimal design of the grating structure quite challenging, since a fully periodic grating operates only in specific spectral ranges. To achieve a more broadband design, semiperiodicity is introduced, which, due to having controllable disorder, is an apt solution in broadband optical applications. In this work, semiperiodic double gratings as a broadband photon man

APA, Harvard, Vancouver, ISO, and other styles

14

Poletto, Luca, Fabio Frassetto, Günter Brenner, Marion Kuhlmann, and Elke Plönjes. "Double-grating monochromatic beamline with ultrafast response for FLASH2 at DESY." Journal of Synchrotron Radiation 25, no. 1 (2018): 131–37. http://dx.doi.org/10.1107/s1600577517013777.

Full text

Abstract:

The preliminary design of a monochromatic beamline for FLASH2 at DESY is presented. The monochromator is tunable in the 50–1000 eV energy range with resolving power higher than 1000 and temporal response below 50 fs over the whole energy range. A time-delay-compensated configuration using the variable-line-spacing monochromator design with two gratings is adopted: the first grating disperses the radiation on its output plane, where the intermediate slit performs the spectral selection; the second grating compensates for the pulse-front tilt and for the spectral dispersion due to diffraction fr

APA, Harvard, Vancouver, ISO, and other styles

15

Yan, Aimin, Xizeng Wu, and Hong Liu. "Predicting fringe visibility in dual-phase grating interferometry with polychromatic X-ray sources." Journal of X-Ray Science and Technology 28, no. 6 (2020): 1055–67. http://dx.doi.org/10.3233/xst-200726.

Full text

Abstract:

Dual phase grating X-ray interferometry is radiation dose-efficient as compared to common Talbot-Lau grating interferometry. The authors developed a general quantitative theory to predict the fringe visibility in dual-phase grating X-ray interferometry with polychromatic X-ray sources. The derived formulas are applicable to setups with phase gratings of any phase modulation and with either monochromatic or polychromatic X-rays. Numerical simulations are presented to validate the derived formulas. The theory provides useful tools for design optimization of dual-phase grating X-ray interferomete

APA, Harvard, Vancouver, ISO, and other styles

16

Jin, Xiaomin, Simeon Trieu, Gregory Chavoor, and Gabriel Halpin. "Enhancing GaN LED Efficiency through Nano-Gratings and Standing Wave Analysis." Nanomaterials 8, no. 12 (2018): 1045. http://dx.doi.org/10.3390/nano8121045.

Full text

Abstract:

Based on our recent work, this paper reviews our theoretical study on gallium nitride (GaN) light-emitting-diode (LED). The focus of the paper is to improve LED light extraction efficiency through various nano-grating designs. The gratings can be designed at different locations, such as at the top, the middle, and the bottom, on the LED. They also can be made of different materials. In this study, we first present a GaN LED error-grating simulation model. Second, nano Indium Tin Oxide (ITO) top gratings are studied and compared with conventional LED (CLED) using standing wave analysis. Third,

APA, Harvard, Vancouver, ISO, and other styles

17

KUO, JU-NAN. "LENGTH AND WIDTH EFFECTS OF METAL FILMS ON STRESS-INDUCED BENDING OF SURFACE MICROMACHINED CANTILEVER CURVED GRATING." Surface Review and Letters 19, no. 01 (2012): 1250001. http://dx.doi.org/10.1142/s0218625x12500011.

Full text

Abstract:

In this study, the length and width effects of metal films on the stress-induced bending of a surface micromachined cantilever curved grating are systematically investigated. A characterization of cantilever curved gratings with various lengths and widths was conducted to observe out-of-plane deformation. A finite element model was established to analyze the deformation. Finite element analysis and experimental results indicate that the commonly used beam theory formula for predicting the deformation of surface micromachined cantilever curved gratings is not valid for these devices. Experiment

APA, Harvard, Vancouver, ISO, and other styles

18

Zhang, S., J. W. Zhang, Y. Zhou, et al. "Analysis of wavefront effects for large-aperture tiled-grating compressor." Laser and Particle Beams 36, no. 1 (2018): 84–91. http://dx.doi.org/10.1017/s0263034617000878.

Full text

Abstract:

AbstractMonolithic large-aperture diffraction grating tiling is desired to increase the output capability of multi-kilojoule petawatt laser facilities. However, the wavefront errors of input pulse and gratings will degrade the focal spot quality and the compressibility of the output pulse. In this work, the effects of wavefront error of input pulse, deformation and wave aberration of the grating for the large-aperture tiled-grating compressor are investigated theoretically. A series of numerical simulations are presented to discuss the changing trends of focal spot energy caused by wavefront e

APA, Harvard, Vancouver, ISO, and other styles

19

Zhu, Dan Dan, Jian Song, Xiu Zhen Hu, and Yuan Yuan Zhang. "Design of Sampled Fiber Bragg Grating Comb Filter." Applied Mechanics and Materials 397-400 (September 2013): 1850–53. http://dx.doi.org/10.4028/www.scientific.net/amm.397-400.1850.

Full text

Abstract:

This article based on the theoretical basis of sampled fiber grating, using transfer matrix method to analyse sampled fiber grating, and the analysed the spectrum of sampled fiber grating, and studied sampled fiber grating filter properties. by adjusting the parameters of sampling grating such as: the length of the grating, grating period, duty ratio ( sampling rate) and other parameters, to construct 6 comb filter, and finally come to sampled fiber grating filter preparation method and process in the theory, analysed the application of sampled fiber grating filter in some optical fiber commun

APA, Harvard, Vancouver, ISO, and other styles

20

Kahn, Steven M. "High Throughput Soft X-ray Spectroscopy With Reflection Gratings." International Astronomical Union Colloquium 115 (1990): 365–75. http://dx.doi.org/10.1017/s0252921100012598.

Full text

Abstract:

ABSTRACT:As dispersing elements, grazing incidence reflection gratings offer the unique combination of high dispersion and wide spectral coverage at high efficiency. They can therefore be coupled with large area, low-resolution mirrors and high quantum efficiency detectors to yield moderate resolution spectroscopy of faint X-ray sources. Various design options are presented and compared, including both objective and convergent-beam configurations and both in-plane and off-plane grating mountings. A specific reflection grating payload design for ESA’s X-Ray Multi-Mirror Mission (XMM) is reviewe

APA, Harvard, Vancouver, ISO, and other styles

21

Maksimović, Milan. "MEMS mirrors using sub-wavelength High- Contrast-Gratings with asymmetric unit cells." Electronics ETF 19, no. 2 (2016): 52. http://dx.doi.org/10.7251/els1519052m.

Full text

Abstract:

High-contrast gratings (HCG) are ultra-thin elements operating in sub-wavelength regime with the period of the grating smaller than the wavelength and with the high-index grating material fully surrounded by low-index material. Design of MEMS mirrors made from HCG with specific reflectivity response is of great practical interest in integrated optoelectronics. We theoretically investigate design of the spectral response for HCGs with the complex unit cells. We show that the spectral response can be tailored via the unit cell perturbations and with the asymmetric unit cell perturbations may int

APA, Harvard, Vancouver, ISO, and other styles

22

Plaum, Burkhard, Martin Schubert, Achim Zeitler, Walter Kasparek, Carsten Lechte, and Jörg Stober. "Development of reflection gratings for advanced ECRH scenarios." EPJ Web of Conferences 203 (2019): 04012. http://dx.doi.org/10.1051/epjconf/201920304012.

Full text

Abstract:

An existing framework for the design of reflection gratings was reworked. It takes the astigmatic complex beam parameters and the orientations of the beam axes of the incident and reflected beams as input and synthesizes a grating, which transforms the incident beam into the reflected beam. This is done by decomposing the 3D problem into a series of 2D reflections of plane waves. The 2D grating profiles are optimized in parallel on multiple computers. Finally, the 3D grating is derived using a simplified interpolation scheme.

APA, Harvard, Vancouver, ISO, and other styles

23

Liu, Xuan, Lisa Samfaß, Kevin Kolpatzeck, et al. "Terahertz Beam Steering Concept Based on a MEMS-Reconfigurable Reflection Grating." Sensors 20, no. 10 (2020): 2874. http://dx.doi.org/10.3390/s20102874.

Full text

Abstract:

With an increasing number of applications of terahertz systems in industrial fields and communications, terahertz beamforming and beam steering techniques are required for high-speed, large-area scanning. As a promising means for beam steering, micro-electro-mechanical system (MEMS)-based reflection gratings have been successfully implemented for terahertz beam control. So far, the diffraction grating efficiency is relatively low due to the limited vertical displacement range of the reflectors. In this paper, we propose a design for a reconfigurable MEMS-based reflection grating consisting of

APA, Harvard, Vancouver, ISO, and other styles

24

Li, Xinghui, Yaping Shi, Xiang Xiao, et al. "Design and Testing of a Compact Optical Prism Module for Multi-Degree-of-Freedom Grating Interferometry Application." Applied Sciences 8, no. 12 (2018): 2495. http://dx.doi.org/10.3390/app8122495.

Full text

Abstract:

In this research, a key optical component for multi-degree-of-freedom (MDOF) surface encoder was designed, fabricated and evaluated. In a MDOF grating interferometry system, there are four diffraction beams from a two-axis scale grating and reference grating, respectively. For further modulation, these beams will propagate more than 100 mm, which makes paralleling these beams necessary. In previous research, collimation lens, separate prisms and a home fabricated diffraction device by combining four separate one-axis line gratings in a glass substrate have been demonstrated. However, large pow

APA, Harvard, Vancouver, ISO, and other styles

25

Zhou, Bo, Zhong Yan Liu, and Long Rao. "A Sinusoidal Grating Design and Performance Analysis." Advanced Materials Research 605-607 (December 2012): 1027–30. http://dx.doi.org/10.4028/www.scientific.net/amr.605-607.1027.

Full text

Abstract:

Obtain 3-D profilometry of object by phase in optics 3-D techniques, need to project sinusoidal grating on the surface of object measured. To improve the contrast intensity of projection sinusoidal pattern, introduce pulse-width modulation method of electrical engineering to design sinusoidal grating. Firstly, analyze the feasibility of designing sinusoidal grating using high frequency triangular waveforms modulating sinusoidal waveform. Describe light intensity distribution function of 3-D measurement. Give instantiation of creating sinusoidal grating. Finally, analyze frequency spectrum perf

APA, Harvard, Vancouver, ISO, and other styles

26

Cheng, J. T., W. L. Zhao, C. Zhao, and W. H. Wu. "Design of Sinusoidal Grating Projection Depicts Transmission." Key Engineering Materials 567 (July 2013): 149–54. http://dx.doi.org/10.4028/www.scientific.net/kem.567.149.

Full text

Abstract:

The measurement of body contours grating fringe projection technology is the three-dimensional measurement of a hotspot. Basic principle is to be tested based on grating projection three-dimensional object shape; key technology is to enable the generation of sinusoidal grating projection stripes projected onto the measured object. Theoretical sinusoidal intensity stripes should be a phase grating, but such grating is difficult and costly. Therefore, this paper structure of smooth three-dimensional measurement system, the core scanning devices-grating, through the characterization method to des

APA, Harvard, Vancouver, ISO, and other styles

27

Erme, E., and P. Truusalu. "Design of upgraded plane grating monochromators using variable spacing gratings." Journal of Optics 24, no. 1 (1993): 43–47. http://dx.doi.org/10.1088/0150-536x/24/1/009.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Wang, Chengchen, Jianshe Ma, Hongxu Kao, Taihui Wu, and Ping Su. "Wide-Band High Concentration-Ratio Volume-Holographic Grating for Solar Concentration." Sensors 20, no. 21 (2020): 6080. http://dx.doi.org/10.3390/s20216080.

Full text

Abstract:

Efficient and low-cost solar-energy collection has become the focus of many research works. This paper proposes a recording method and an experimental verification of a wide-band, large-angle, and high concentration-ratio volume-holographic grating for solar concentration. We applied the Kogelnik coupled-wave theory and photopolymer diffusion model to analyse the formation mechanism and influencing factors on the diffraction efficiency of monochromatic volume-holographic gratings. We design and construct a three-color laser-interference system to record three monochromatic volume-holographic g

APA, Harvard, Vancouver, ISO, and other styles

29

Mirotznik, Mark, William Beck, Kimberly Olver, John Little, and Peter Pa. "Passive Infrared Sensing Using Plasmonic Resonant Dust Particles." International Journal of Optics 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/651563.

Full text

Abstract:

We present computational and experimental results of dust particles that can be tuned to preferentially reflect or emit IR radiation within the 8–14 μm band. The particles consist of thin metallic subwavelength gratings patterned on the surface of a simple quarter wavelength cavity. This design creates distinct IR absorption resonances by combining the plasmonic resonance of the grating with the natural resonance of the cavity. We show that the resonance peaks are easily tuned by varying either the geometry of the grating or the thickness of the cavity. Here, we present a computational design

APA, Harvard, Vancouver, ISO, and other styles

30

Zhang, Shan Wen, and Jian Xin Ying. "Optimization of the Two Parameters of Classical Blaze Grating in Littrow Mount." Advanced Materials Research 535-537 (June 2012): 1332–36. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.1332.

Full text

Abstract:

On the base of electromagnetic theory of gratings, we analyse the effects of both of two important parameters of classical blaze grating in Littrow mount to diffraction efficiency, and the two parameters are optimized for obtaining highest diffraction efficiency. It is presented that not only blaze angle but apex angle affect diffraction efficiency. The investigation has been performed on the design and fabrication of classical blaze grating which has high diffraction efficiency.

APA, Harvard, Vancouver, ISO, and other styles

31

Neustock, Lars Thorben, Sabrina Jahns, Jost Adam, and Martina Gerken. "Optical Waveguides with Compound Multiperiodic Grating Nanostructures for Refractive Index Sensing." Journal of Sensors 2016 (2016): 1–11. http://dx.doi.org/10.1155/2016/6174527.

Full text

Abstract:

The spectral characteristics and refractive index sensitivity of compound multiperiodic grating waveguides are investigated in theory and experiment. Compound gratings are formed by superposition of two or more monoperiodic gratings. Compared to monoperiodic photonic crystal waveguides, compound grating waveguides offer more degrees of design freedom by choice of component grating periods and duty cycles. Refractive index sensing is achieved by evaluating the wavelength or intensity of guided mode resonances in the reflection spectrum. We designed, fabricated, and characterized 24 different co

APA, Harvard, Vancouver, ISO, and other styles

32

Huang, Jian Wei, and Huai Yi Chen. "Systematic Design of a Highly Efficient Uniform Grating Coupler with Gradually Etched Depths for SOI Waveguides." Advanced Materials Research 663 (February 2013): 713–16. http://dx.doi.org/10.4028/www.scientific.net/amr.663.713.

Full text

Abstract:

This study systematically designs a grating coupler with gradually etched depth on the silicon-on-insulator (SOI) substrate. We focus on the modulation design of the grating coupler with gradually etched depth. The proposed grating coupler is suitable for single TE-mode fiber coupling at the wavelength of 1.55μm. Its fiber coupling efficiency can be up to 57%, fiber coupling angle is 8o and the 1dB bandwidth is 73 nm. These results are better than those of conventional uniform grating coupler without gradually etched depth in terms of efficiency. The grating coupler proposed here is easier to

APA, Harvard, Vancouver, ISO, and other styles

33

Malayappan, Balasubramanian, Narayan Krishnaswamy, and Prasant Kumar Pattnaik. "Novel High-Resolution Lateral Dual-Axis Quad-Beam Optical MEMS Accelerometer Using Waveguide Bragg Gratings." Photonics 7, no. 3 (2020): 49. http://dx.doi.org/10.3390/photonics7030049.

Full text

Abstract:

A novel lateral dual-axis a-Si/SiO2 waveguide Bragg grating based quad-beam accelerometer with high-resolution and large linear range has been presented in this paper. The sensor consists of silicon bulk micromachined proof mass suspended by silica beams. Three ridge gratings are positioned on the suspending beam and proof mass to maximize sensitivity and reduce noise. Impact of external acceleration in the sensing direction on the Bragg wavelength of gratings and MEMS structure has been modelled including the effects of strain, stress and temperature variation. Acceleration induces stress in

APA, Harvard, Vancouver, ISO, and other styles

34

Montero-Orille, Carlos, Xesús Prieto-Blanco, Héctor González-Núñez, and Jesús Liñares. "A Polygonal Model to Design and Fabricate Ion-Exchanged Diffraction Gratings." Applied Sciences 11, no. 4 (2021): 1500. http://dx.doi.org/10.3390/app11041500.

Full text

Abstract:

We propose a simple polygonal model to describe the phase profile of ion-exchanged gratings. This model enables the design of these gratings, as well as the characterization of the ion-exchange process itself. Several ion-exchanged gratings were fabricated to validate the model and to characterize the process involved in their fabrication. From this characterization, we show the practical utility of the model by designing and fabricating both a grating that removes the zero order and a three splitter. The performance of these two elements was good, although the first one stood out especially b

APA, Harvard, Vancouver, ISO, and other styles

35

Liu, Wei-Nan, Rui Chen, Wei-Yi Shi, Ke-Bo Zeng, Fu-Li Zhao, and Jian-Wen Dong. "Narrow-frequency sharp-angular filters using all-dielectric cascaded meta-gratings." Nanophotonics 9, no. 10 (2020): 3443–50. http://dx.doi.org/10.1515/nanoph-2020-0141.

Full text

Abstract:

AbstractSelective transmission or filtering always responds to either frequency or incident angle, so as hardly to maximize signal-to-noise ratio in communication, detection and sensing. Here, we propose compact meta-filters of narrow-frequency sharp-angular transmission peak along with broad omnidirectional reflection sidebands, in all-dielectric cascaded subwavelength meta-gratings. The inherent collective resonance of waveguide-array modes and thin film approximation of meta-grating are employed as the design strategy. A unity transmission peak, locating at the incident angle of 44.4° and t

APA, Harvard, Vancouver, ISO, and other styles

36

Ura, Shogo, Shunsuke Murata, Yasuhiro Awatsuji, and Kenji Kintaka. "Design of resonance grating coupler." Optics Express 16, no. 16 (2008): 12207. http://dx.doi.org/10.1364/oe.16.012207.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Brenner, T., C. H. Joyner, and M. Zirngibl. "Compact design waveguide grating routers." Electronics Letters 32, no. 18 (1996): 1660. http://dx.doi.org/10.1049/el:19961120.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Morimoto, Naoki, Sho Fujino, Yasuhiro Ito, et al. "Design and demonstration of phase gratings for 2D single grating interferometer." Optics Express 23, no. 23 (2015): 29399. http://dx.doi.org/10.1364/oe.23.029399.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Jiang, Min Lan, Fu Peng Li, and Xiao Dong Wang. "Mini-Nano-Displacement Measurement with Double Diffraction Grating." Advanced Materials Research 230-232 (May 2011): 1159–63. http://dx.doi.org/10.4028/www.scientific.net/amr.230-232.1159.

Full text

Abstract:

Based on Doppler and Fourier optics analysis method, analyzed the configuration of double diffraction grating, and built its non-contact optical measurement mathematic model. And built double diffraction grating interference displacement measurement system, the design of double diffraction light path can compensate the deflection angle of grating moving, greatly improved tolerance of grating’s deflection. The compact and micro configuration of its light path, shorten optical distance, improving system’s environment anti-interference ability. Experimental resulting show, within 20nm displacemen

APA, Harvard, Vancouver, ISO, and other styles

40

Butt, Muhammad Ali. "Numerical investigation of a small footprint plasmonic Bragg grating structure with a high extinction ratio." Photonics Letters of Poland 12, no. 3 (2020): 82. http://dx.doi.org/10.4302/plp.v12i3.1042.

Full text

Abstract:

In this paper, miniaturized design of a plasmonic Bragg grating filter is investigated via the finite element method (FEM). The filter is based on a plasmonic metal-insulator-metal waveguide deposited on a quartz substrate. The corrugated Bragg grating designed for near-infrared wavelength range is structured on both sides of the waveguide. The spectral characteristics of the filter are studied by varying the geometric parameters of the filter design. As a result, the maximum ER and bandwidth of 36.2 dB and 173 nm is obtained at λBragg=976 nm with a filter footprint of as small as 1.0 x 8.75 µ

APA, Harvard, Vancouver, ISO, and other styles

41

Wang, W. C. "Design of Optical System for Laser Rangefinder." Advanced Materials Research 187 (February 2011): 581–85. http://dx.doi.org/10.4028/www.scientific.net/amr.187.581.

Full text

Abstract:

The principle and classes of grating sensors are analyzed in this paper firstly. To the high-precision requirement of rangefinder for the measurement of high voltage cables, the design method based on grating sensor is proposed. It is realized by installing two grating sensors on the rangefinder platform which are used for outputting the elevation angle and the horizontal angle. The subdivision circuit of system is described in detail by using E-subdivision algorithm. Experiment shows that it can increase the measure precision greatly.

APA, Harvard, Vancouver, ISO, and other styles

42

Chen, Jia Yin, and Guo Jun Liu. "Design of Surface Plasmon Polariton Sensor Design by Grating Structure." Applied Mechanics and Materials 513-517 (February 2014): 2676–79. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.2676.

Full text

Abstract:

Surface plasmon polariton (SPP) waves exhibit local characteristics that can break diffraction limits; for this reason, the production of subwavelength optoelectronic device has been the focus of current studies. To determine the importance of surface plasmon wave applications, we aim to investigate whether or not the theoretical dispersion obtained in the plasma and metal (Drude model) exhibits the same expression, satisfy the relationship of SPPs by controlling the electron density of the plasma and the frequency of the incident electromagnetic wave, and derive the system performance paramet

APA, Harvard, Vancouver, ISO, and other styles

43

Hisham, Hisham K. "Low Dispersion Performance of Plastic Fiber Grating Using Genetic Algorithms." Al-Nahrain Journal for Engineering Sciences 21, no. 1 (2018): 45. http://dx.doi.org/10.29194/njes21010045.

Full text

Abstract:

In this paper, we suppose a method for reducing the dispersion in the plastic optical fiber (POF) Bragg gratings based on optimizing the grating coupling-strength (ξ) using genetic algorithms. The effects of average refractive index (δn) and temperature (T) change on the dispersion properties are investigated numerically. It is found that the amplitude of the δn for low dispersion performance needs to be reduced at the cost of the design complexity of the POF Bragg gratings. Owing to the unusually large and negative thermo-optic coefficient of the POF, the dispersion due to the wavelength shif

APA, Harvard, Vancouver, ISO, and other styles

44

Liu, Jianpeng, Xin Li, Shuo Chen, et al. "Nanofabrication and characterization of a grating-based condenser for uniform illumination with hard X-rays." Journal of Synchrotron Radiation 24, no. 3 (2017): 595–99. http://dx.doi.org/10.1107/s1600577517002247.

Full text

Abstract:

In the development of full-field transmission X-ray microscopy for basic study in science and technology, a condenser capable of providing intense illumination with high uniformity and stability on tested specimens in order to achieve high-quality images is essential. The latest design of a square-shaped condenser based on diffractive gratings has demonstrated promising uniformity in illumination. This paper describes in more detail the development of such a beam shaper for hard X-rays at 10 keV with regard to its design, manufacture and optical characterization. The effect of the grating prof

APA, Harvard, Vancouver, ISO, and other styles

45

Yang, Xiaowei, Hongchang Wang, Matthew Hand, et al. "Design of a multilayer-based collimated plane-grating monochromator for tender X-ray range." Journal of Synchrotron Radiation 24, no. 1 (2017): 168–74. http://dx.doi.org/10.1107/s1600577516017884.

Full text

Abstract:

Collimated plane-grating monochromators (cPGMs), consisting of a plane mirror and plane diffraction grating, are essential optics in synchrotron radiation sources for their remarkable flexibility and good optical characteristics in the soft X-ray region. However, the poor energy transport efficiency of a conventional cPGM (single-layer-coated) degrades the source intensity and leaves reduced flux at the sample, especially for the tender X-ray range (1–4 keV) that covers a large number of K- and L-edges of medium-Z elements, and M-edges of high-Z elements. To overcome this limitation, the use o

APA, Harvard, Vancouver, ISO, and other styles

46

Cai, Er Fei, Yong Qing Huang, Xiao Feng Duan, and Xiao Min Ren. "Design and Analysis of Optical-Communication-Band Sub-Wavelength Grating Polarizer." Advanced Materials Research 683 (April 2013): 207–10. http://dx.doi.org/10.4028/www.scientific.net/amr.683.207.

Full text

Abstract:

According to the requirement of the optical communication devices, sub-wavelength grating polarizer was studied based on rigorous coupled-wave analysis (RCWA) and designed with SOI materials. The paper analyzes the grating parameters such as the period, depth, fill groove that influence the diffraction efficiency of the grating. The TM mode diffraction efficiency is more than 95%, and the TE mode diffraction efficiency is less than 5%, the pyramidal sub-wavelength polarizer grating has good polarizer performance than others shapes in the optical communication band of 1550nm. In this paper, we

APA, Harvard, Vancouver, ISO, and other styles

47

Yoshida, Hiroaki, and Koichiro Mitsuke. "Design of an 18 m spherical-grating monochromator at UVSOR." Journal of Synchrotron Radiation 5, no. 3 (1998): 774–76. http://dx.doi.org/10.1107/s090904959701710x.

Full text

Abstract:

An 18 m spherical-grating monochromator with high resolution and high photon flux has been developed at the bending-magnet beamline BL2B2 of the UVSOR facility in the Institute for Molecular Science. The monochromator is designed to cover the energy range 20–200 eV by using three gratings: G1 (2400 lines mm−1, R = 18 m) at 80–200 eV; G2 (1200 lines mm−1, R = 18 m) at 40–100 eV; G3 (2400 lines mm−1, R = 9.25 m) at 20–50 eV. A resolving power of 5000 and a photon flux of more than 1010 photons s−1 are expected at a 100 mA ring current. A small including angle of 140° is adopted for G3 and two pl

APA, Harvard, Vancouver, ISO, and other styles

48

Kroneberger, Monika, Andreas Mezger, and Stephanie Becker. "Stray light and ghosts in catadioptric spectrometers: incorporating grating scatter measurements into simulations and ghost sensitivity into system design." Advanced Optical Technologies 7, no. 6 (2018): 377–86. http://dx.doi.org/10.1515/aot-2018-0039.

Full text

Abstract:

Abstract The accurate simulation of stray light is essential for the verification of the contrast requirements in optical instruments. In a spectrometer, the scattering from reflective gratings is difficult to characterize while contributing significantly to the overall system stray light and reduction of the spectrometer contrast. In addition, the multiple diffraction orders create a ghost sensitive environment, which must be considered in the design of the instrument. In this article, we present an experimental setup for, and measurement results from, the characterization of the bidirectiona

APA, Harvard, Vancouver, ISO, and other styles

49

Han, Wei Na, Peng Yu, and Qun Li Li. "Design of Grating Displacement Measuring System Based on Single Chip Microcomputer." Applied Mechanics and Materials 389 (August 2013): 606–11. http://dx.doi.org/10.4028/www.scientific.net/amm.389.606.

Full text

Abstract:

The thesis presents a set of design scheme of grating displacement measuring system by taking SCM (Single Chip Microcomputer) as the core component. It describes the system design principle and the design process of software and hardware in details, i.e. realizing standard TTL level signal output through the processing of grating output signal amplification, sub-dividing, modulation and driving, so that grating output signal could match the numerical control system. It turns out that the designed grating displacement measuring system is able to satisfy the requirement of high-speed sampling an

APA, Harvard, Vancouver, ISO, and other styles

50

Kawakami, Yusuke, Man He, and Yeong Hee Cho. "Design of high-performance holographic gratings using siloxane-containing mesogenic compounds." Pure and Applied Chemistry 78, no. 10 (2006): 1835–42. http://dx.doi.org/10.1351/pac200678101835.

Full text

Abstract:

Fine holographic gratings were fabricated using siloxane- and mesogen-containing compounds. A grating with 40 % diffraction efficiency was formed with 10 wt % non-liquid-crystalline 4-methoxyphenyl 4-[4-(pentamethyldisiloxanyl)butoxy]benzoate and trimethylolpropane triacrylate. 4-Methoxyphenyl 4-[4-(1,1,3,3,5,5,5-heptamethyltrisiloxan-1-yl)butoxy]-benzoate gave 50 % diffraction efficiency and angular selectivity of 5°. Siloxane-containing liquid-crystalline compounds were also effective in fabricating fine gratings. These compounds induced distinct phase separation over a concentration range f

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!