Results 61 to 70 of about 12,562 (253)

Resonance phenomena in one-dimensional grating-based structures

Semiconductor Physics, Quantum Electronics & Optoelectronics, 2017
Enhanced optical transmission through metallic 1-D grating-based structures has been studied using the rigorous coupled wave analysis. The results have shown that optical transmission is determined by waveguide properties of the grating slit, and there ...
I.Ya. Yaremchuk, V.M. Fitio, Ya.V. Bobitski   +2 more
doaj   +1 more source

Optical Signature of Moiré Superlattices Formed by Twisted SrTiO3 Membranes

Advanced Functional Materials, EarlyView.
We discover optical signatures from bonded interfaces in twisted SrTiO3 moiré superlattices, including low‐frequency Raman vibrational modes and strong second‐harmonic generation, consistent with strong interlayer coupling inferred from cross‐sectional electron microscopy and ab initio calculations. ABSTRACT Moiré superlattices formed at the interfaces
T. A. M. Ragib Shahriar, Fumikazu Murakami, Xing He, Konnor Koons, Xinyan Li, Bumseop Kim, Shihan Qin, Varun Harbola, Jochen Mannhart, Yimo Han, Ruijuan Xu, Shengxi Huang, Andrew M. Rappe, Hanyu Zhu   +13 more
wiley   +1 more source

A Chirped Subwavelength Grating With Both Reflection and Transmission Focusing

IEEE Photonics Journal, 2013
A planar lens composed of a chirped subwavelength grating (CSG) structure with high numerical aperture (NA) was designed and analyzed in this paper. The reflectivity, transmission, and phase were calibrated as a function of the grating dimension using ...
Xiaomin Lv, Weibin Qiu, Jia-Xian Wang, Yuhui Ma, Jing Zhao, Mengke Li, Hongyan Yu, Jiaoqing Pan   +7 more
doaj   +1 more source

Electrospun Wood‐Derived Biopolymers as Electrodes in Electrochemical Energy Storage Technologies

Advanced Functional Materials, EarlyView.
Electrospinning transforms wood‐derived cellulose and lignin into architecturally defined, binder‐free carbon electrodes with tuneable porosity and functionality. This review shows how fibre design enables decoupled charge and mass transport, enhancing performance across battery systems, while identifying key challenges in spinnability, scalability ...
Michael W. Thielke, Hattie R. Chisnall, Jesus Vazquez Chavez, Ana B. Jorge Sobrido   +3 more
wiley   +1 more source

From Photoalignment to Structured Light: Liquid Crystal Platforms for Beam Shaping and Complex Wavefronts

Advanced Functional Materials, EarlyView.
Photoaligned and photopatterned liquid crystal platforms provide programmable control of optical phase, polarization, and spin‐orbit interactions, enabling compact generation of structured light and complex wavefronts. This review highlights how tailored molecular orientations transform simple beams into designed optical fields, opening versatile ...
Le Zhou, Tingjun Zhong, Sijie Liu, Pouya Nosratkhah, Ke Xu, Yuzhen Zhao, Kristiaan Neyts   +6 more
wiley   +1 more source

A proposal of a perfect graphene absorber with enhanced design and fabrication tolerance

Scientific Reports, 2017
We propose a novel device structure for the perfect absorption of a one-sided lightwavve illumination, which consists of a high-contrast grating (HCG) and an evanescently coupled slab with an absorbing medium (graphene).
Sangjun Lee, Thang Q. Tran, Hyungjun Heo, Myunghwan Kim, Sangin Kim   +4 more
doaj   +1 more source

A broadband multilayered nonpolarization resonant reflector

IEEE Photonics Journal, 2015
A nonpolarization reflector constructed by a multilayered 1-D grating structure with a multisubpart profile is proposed and fabricated. Rigorous coupled-wave analysis for multilayered grating structure is adopted to theoretically investigate the ...
L. Huang, D. Liang, J. Zeng, Y. Xiao, H. Wu   +4 more
doaj   +1 more source

Light Diffraction From a Flexible Patterned Layer With Periodically Arranged Dimples

IEEE Photonics Journal, 2020
Patterns with periodically arranged dimples are fabricated by an inexpensive soft-imprint lithography technique on a flexible transparent polymer substrate. Excellent diffraction characteristics, with highly intense and fine features, are seen from these
Arpita Haldar, Vijaya Ramarao
doaj   +1 more source

Polarization‐Dependent Synaptic‐Like Electro‐Optical Response in Ferroelectric Nematic Liquid Crystals

Advanced Functional Materials, EarlyView.
Ferroelectric nematic liquid crystals (FNLCs) offer fast, tunable polarization and low‐voltage operation but suffer from poor polarization retention at zero field. Semiconductor‐modified FNLCs enhance polarization retention and exhibit short‐ and long‐term electro‐optical responses, while also supporting spike‐type signal integrations.
Kutay Sagdic, Weiming Yao, Danqing Liu
wiley   +1 more source

Reducing complexity in photonic simulations: ZenScat — an efficient 2D RCWA solver

SoftwareX
We present a comprehensive solver implementation of a 2D Rigorous Coupled Wave Analysis (RCWA), tailored specifically for conformal thin multilayer devices and 2D photonic crystals with arbitrary interface profiles.
I. Lukosiunas, D. Gailevicius, K. Staliunas   +2 more
doaj   +1 more source