Results 21 to 30 of about 11,782 (294)

Effects of Measurement Configurations on the Sensitivity of Morpho Butterfly Scales Based Chemical Biosensor

Frontiers in Physics, 2022
The Morpho butterfly wing with tree-shaped alternating multilayer is an effective chemical biosensor to distinguish between ambient medium, and its detection sensitivity is inextricably linked to the measurement configuration including incident angle ...
Zhengqiong Dong, Zhengqiong Dong, Hang Zhao, Lei Nie, Shaokang Tang, Chenyang Li, Xuanze Wang, Xuanze Wang   +7 more
doaj   +1 more source

Enhancement of Photodetector Responsivity in Standard SOI CMOS Processes by introducing Resonant Grating Structures [PDF]

Journal of the European Optical Society-Rapid Publications, 2011
A new photodetector concept is described, which is fully compatible with the standard SOI CMOS process and does not require any post-processing steps. Our simulations are based on two-dimensional RCWA (Rigorous Coupled Wave Analysis) and local absorption
Auer M., Brenner K.-H.
doaj   +1 more source

Ultrawide-Angle Optical Elements With Enhanced Transmittance Obtained by a Half-Etched Moth-Eye Structure Coating on Infrared Substrates

IEEE Photonics Journal, 2022
With the traditional multilayers coating, it is difficult to achieve broadband and wide-angle antireflection optical properties simultaneously. As one of the most promising candidates for omnidirectional and broadband antireflection coating, the moth-eye
Ziqiang Zhang, Mingzhao Ouyang, Hang Ren, Sitong Shen, Jianhong Zhou, Yuegang Fu   +5 more
doaj   +1 more source

High Efficiency Polarization-Independent Slanted Grating for RGB Bands

IEEE Photonics Journal, 2021
We proposed a slanted grating suitable for RGB bands which is polarization-independent and has a high diffraction efficiency of −1st order under normal incidence.
Ge Jin, Weicheng Liu, Zonghao Ye, Wei Jia, Yongfang Xie, Changhe Zhou   +5 more
doaj   +1 more source

Conditions for Minimizing the Computational Complexity of the RCWA Calculation of the Diffraction Efficiency of Sawtooth Two-Layer Double-Relief Microstructures

Photonics, 2023
In this study, novel recommendations are presented and substantiated for selecting the number of modes and optical thicknesses of flat lattice slabs that make up microreliefs, which minimize the computational complexity of the rigorous coupled-wave ...
Grigoriy I. Greisukh, Artem I. Antonov, Evgeniy G. Ezhov, Viktor A. Danilov, Boris A. Usievich   +4 more
doaj   +1 more source

Coupled-mode theory for resonant gratings with a varying period

Компьютерная оптика, 2023
We propose a coupled-mode theory for resonant diffraction gratings with a varying period. We consider diffractive structures, in which the reciprocal lattice vector, a quantity inversely proportional to the period, varies linearly in the direction of ...
D.A. Bykov, E.A. Bezus, L.L. Doskolovich   +2 more
doaj   +1 more source

Design and fabrication of a vanadium dioxide-based actively switchable wire grid polarizer for near-infrared applications [PDF]

EPJ Web of Conferences, 2023
This study introduces an actively switchable wire grid polarizer exploiting the semiconductor-metal transition of vanadium dioxide. Operating at a near-infrared wavelength, the device features a SiO2 substrate with VO2 deposited by atomic layer ...
Walther Markus, Siefke Thomas, Gerold Kristin, Zeitner Uwe D.   +3 more
doaj   +1 more source

Rigorous coupled-wave analysis of absorption enhancement in vertically illuminated silicon photodiodes with photon-trapping hole arrays

Nanophotonics, 2019
In this paper, we present a rigorous coupled-wave analysis (RCWA) of absorption enhancement in all-silicon (Si) photodiodes with integrated hole arrays of different shapes and dimensions.
Gou Jun, Cansizoglu Hilal, Bartolo-Perez Cesar, Ghandiparsi Soroush, Mayet Ahmed S., Rabiee-Golgir Hossein, Gao Yang, Wang Jun, Yamada Toshishige, Devine Ekaterina Ponizovskaya, Elrefaie Aly F., Wang Shih-Yuan, Islam M. Saif   +12 more
doaj   +1 more source

Selective Properties of Mid-Infrared Tamm Phonon-Polaritons Emitter with Silicon Carbide-Based Structures

Micromachines, 2022
Electromagnetic (EM) absorbers and emitters have attracted much interest because of their versatile applications. A photonic heterostructure composed of silicon carbide (SiC) layer/germanium (Ge) cavity/distributed Bragg reflector (DBR) has been proposed.
Chengxuan Gong, Gaige Zheng
doaj   +1 more source

Effective spectral optical functions of lamellar nanogratings [PDF]

Journal of the European Optical Society-Rapid Publications, 2006
Spectral properties of lamellar sub-wavelength gratings (nanogratings) are described by effective medium approximation (EMA). Analytical spectral formulae for ordinary and extraordinary effective optical functions are derived for nanogratings consisting ...
Foldyna Martin, Postava Kamil, Ossikovski Razvigor, De Martino Antonello, Garcia-Caurel Enric   +4 more
doaj   +1 more source