Results 31 to 40 of about 12,820 (148)

Ultra-Broadband Optical Filter Based on Step-Chirped Multimode Waveguide Bragg Grating

IEEE Photonics Journal
An ultra-broadband optical filter based on step-chirped multimode waveguide Bragg grating (SCMWBG) with low insertion loss, high sidelobe suppression ratio (SLSR), compact size and relaxed fabrication accuracy is demonstrated on SOI platform. The grating
Nannan Ning, Qiang Zhang, Zhujun Wei, Qikai Huang, Penghui Xia, Yuehai Wang, Jianyi Yang, Hui Yu   +7 more
doaj   +1 more source

Broadband Three-Mode Tunable Metamaterials Based on Graphene and Vanadium Oxide

Nanomaterials
Terahertz waves have great potential for applications in security imaging, wireless communication, and other fields, but efficient and tunable terahertz-absorbing devices are the key to their technological development.
Hao Wen, Shouwei Wang, Yiyang Cai, Zhuochen Zou, Zheng Qin, Tianyu Gao   +5 more
doaj   +1 more source

Dynamically Tunable Electromagnetically Induced Transparency in Graphene-Based Coupled Micro-ring Resonators

IEEE Photonics Journal, 2017
A dynamically tunable electromagnetically induced transparency (EIT) system consisting of two coupled micro-ring resonators, one of which is embedded with a graphene layer, is proposed and numerically demonstrated.
Xuetong Zhou, Tian Zhang, Xiang Yin, Lin Chen, Xun Li   +4 more
doaj   +1 more source

Polarization-independent tunable optical filter with variable bandwidth based on silicon-on-insulator waveguides

Nanophotonics, 2018
We present a polarization-independent tunable optical filter with variable bandwidth based on silicon-on-insulator (SOI) waveguides. The polarization-independent operation is achieved through the use of a polarization splitter-rotator and a polarization ...
Wang Haoyan, Dai Jincheng, Jia Hao, Shao Sizhu, Fu Xin, Zhang Lei, Yang Lin   +6 more
doaj   +1 more source

Surface Plasmon Resonances in Sierpinski-Like Photonic Crystal Fibers: Polarization Filters and Sensing Applications

Molecules, 2020
We investigate the plasmonic behavior of a fractal photonic crystal fiber, with Sierpinski-like circular cross-section, and its potential applications for refractive index sensing and multiband polarization filters.
William O. F. Carvalho, J. R. Mejía-Salazar   +1 more
doaj   +1 more source

Dynamic Wavelength‐Selective Diffraction and Absorption with Direct‐Patterned Hydrogel Metagrating

Advanced Science
Hydrogel nanophotonic devices exhibit attractive tunable capabilities in structural coloration and optical display. However, current hydrogel‐based tunable strategies are mostly based on a single physical mechanism, and it remains a challenge to merge ...
Chenjie Dai, Xinglong Li, Wen‐xing Yang, Yan Chen, Dingshan Zheng, Nian Cheng, Tao Shui, Huafeng Zhang, Zhongyang Li   +8 more
doaj   +1 more source

Pilot protection based on the quasi-directional element of LCL-tuned half-wavelength transmission line

International Journal of Electrical Power & Energy Systems
To create HWTL characteristics, the electrical distance of AC transmission lines is compensated to half the power frequency wavelength by utilizing tuned circuits.
Yutao Tang, Hongchun Shu, Yue Dai, Yu Zhang, Yiming Han   +4 more
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Electrically tuned whispering gallery modes microresonator based on microstructured optical fibers infiltrated with dual-frequency liquid crystals

Nanophotonics, 2018
An electrically tunable whispering gallery mode (WGM) microresonator based on an HF-etched microstructured optical fiber (MOF) infiltrated with dual-frequency liquid crystals (DFLCs) is proposed and experimentally demonstrated for the investigation of ...
Yang Chengkun, Zhang Hao, Liu Bo, Liu Haifeng, Wang Chao, Lin Shiwei   +5 more
doaj   +1 more source

Two-stage lithium niobate nonlinear photonic circuits for low-crosstalk and broadband all optical wavelength conversion

APL Photonics
All optical wavelength converters (AOWCs) that can effectively and flexibly switch optical signals between different wavelength channels are essential elements in future optical fiber communications and quantum information systems.
Xiaoting Li, Haochuan Li, Zhaoxi Chen, Fei Ma, Ke Zhang, Wenzhao Sun, Cheng Wang   +6 more
doaj   +1 more source

Dual-band, polarization-insensitive metamaterial perfect absorber based on monolayer graphene in the mid-infrared range

Results in Physics, 2019
A dual-band, polarization-insensitive metamaterials (MMs) perfect absorber based on monolayer graphene in the mid-infrared range were designed and researched.
Hailiang Li, Jiebin Niu, Guanya Wang
doaj   +1 more source