Results 1 to 10 of about 334,082 (299)
Biosensors, 2021 Guided-mode resonance (GMR) sensors are widely used as biosensors with the advantages of simple structure, easy detection schemes, high efficiency, and narrow linewidth. However, their applications are limited by their relatively low sensitivity (
Chengrui Zhang +5 more
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Optics Express, 2023 We propose the concept of a Dirac grating, where periodic permittivity perturbations approach a train of Dirac functions. We show that Dirac gratings can yield identical spectral characteristics for higher-order gratings compared to first-order gratings of the same length. Using an inverse Fourier transform technique, we design different types of Dirac
Saeidi, Shayan +3 more
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Large bandwidth, highly efficient optical gratings through high index materials [PDF]
, 2008 We analyze the diffraction characteristics of dielectric gratings that feature a high index grating layer, and devise, through rigorous numerical calculations, large bandwidth, highly efficient, high dispersion dielectric gratings in reflection ...
Baldry +17 more
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Fabrication of X-ray Gratings for Interferometric Imaging by Conformal Seedless Gold Electroplating
Micromachines, 2021 We present a method to produce small pitch gratings for X-ray interferometric imaging applications, allowing the phase sensitivity to be increased and/or the length of the laboratory setup to be minimized.
Konstantins Jefimovs +7 more
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Sensors, 2020 A new displacement sensor with light-field modulation, named as time grating, was proposed in this study. The purpose of this study was to reduce the reliance on high-precision measurements on high-precision manufacturing.
Min Fu +4 more
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Surface Texture Measurement on Complex Geometry Using Dual-Scan Positioning Strategy
Applied Sciences, 2020 In this paper, a surface measurement method based on dual-scan positioning strategy is presented to address the challenges of irregular surface patterns and complex geometries. A confocal sensor with an internal scanning mechanism was used in this study.
Fang Cheng, Shaowei Fu, Ziran Chen
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Aptamer Functionalized Lipid Multilayer Gratings for Label-Free Analyte Detection
Nanomaterials, 2020 Lipid multilayer gratings are promising optical biosensor elements that are capable of transducing analyte binding events into changes in an optical signal.
Plengchart Prommapan +4 more
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Binary Amplitude Reflection Gratings for X-ray Shearing and Hartmann Wavefront Sensors
Sensors, 2021 New, high-coherent-flux X-ray beamlines at synchrotron and free-electron laser light sources rely on wavefront sensors to achieve and maintain optimal alignment under dynamic operating conditions. This includes feedback to adaptive X-ray optics.
Kenneth A. Goldberg +2 more
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A Microlens Array Grating for Miniature Multi-Channel Spectrometers
Sensors, 2023 Most existing multi-channel spectrometers are constructed by physically stacking single-channel spectrometers, resulting in their large size, high weight, and limited number of channels. Therefore, their miniaturization is urgently needed. In this paper,
Shuonan Shan +5 more
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Polarization independent Bragg gratings using tilted subwavelength grating waveguide Bragg gratings
Optics Express, 2023 We propose and experimentally demonstrate a polarization independent subwavelength grating (SWG) waveguide Bragg grating (WBG) by using an SWG waveguide with tilted segments. By optimizing the tilting angle and other geometry parameters, such as the width and the length of the loading segments used to create the BG, we can obtain a zero birefringence ...
Hao Sun, Lawrence R. Chen
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