scholarly journals Dual-band terahertz polarization converter with high-efficiency asymmetric transmission

2020 ◽  
Vol 10 (8) ◽  
pp. 1853
Author(s):  
Jiu-Sheng Li ◽  
Feng-Qing Bai
Keyword(s):  
High Efficiency ◽  
Dual Band ◽  
Polarization Converter ◽  
Asymmetric Transmission

Dual-band high-efficiency polarization converter using an anisotropic metasurface

2016 ◽  
Vol 119 (18) ◽  
pp. 183103 ◽  
Author(s):  
Baoqin Lin ◽  
Buhong Wang ◽  
Wen Meng ◽  
Xinyu Da ◽  
Wei Li ◽  
...  
Keyword(s):  
High Efficiency ◽  
Dual Band ◽  
Polarization Converter

scholarly journals High-Efficiency Asymmetric Transmission of Red-Near-Infrared Light Based on Chiral Metamaterial

2021 ◽  
Vol 9 ◽  
Author(s):  
Yu Tian ◽  
Zhiwei Chen ◽  
Fang-Fang Ren ◽  
Qingguo Du ◽  
Zhengying Li
Keyword(s):  
Communication Systems ◽  
High Efficiency ◽  
Polarized Light ◽  
Infrared Light ◽  
Polarization Conversion ◽  
Metamaterial Structure ◽  
Polarization Converter ◽  
Asymmetric Transmission ◽  
Linearly Polarized ◽  
Chiral Metamaterial

Designing and fabricating high-performance polarization converters that exhibit asymmetric transmission (AT), for light with different circularly/linearly polarized states with opposite propagating directions, are in high demand. The AT phenomenon leads to potential applications as isolators and circulators in information and communication systems. We propose a chiral metamaterial structure with high AT efficiency for two types of linearly orthogonal polarized red-near-IR light in two opposite incident directions. Theoretical results showed that the proposed chiral metamaterial structure achieves cross-polarization conversion where the polarization conversion ratio (PCR) is over 90%, in a broadband wavelength range from 715 to 810 nm, for both forward-propagating linearly polarized light and backward-propagating orthogonal linearly polarized light. The physical mechanisms of the polarization converter with the AT have been investigated. It was confirmed that the Fabry–Perot-like resonance and coupling between electric and magnetic dipoles lead to highly efficient asymmetric polarization conversion for two orthogonal linearly polarized light. Additionally, the conversion efficiency and bandwidth of the polarization converter are successfully optimized by adjusting the related structure parameters.

Dual-band and high-efficiency polarization converter based on metasurfaces at microwave frequencies

2016 ◽  
Vol 122 (6) ◽  
Author(s):  
Yajun Liu ◽  
Song Xia ◽  
Hongyu Shi ◽  
Anxue Zhang ◽  
Zhuo Xu
Keyword(s):  
High Efficiency ◽  
Dual Band ◽  
Polarization Converter ◽  
Microwave Frequencies

High-Efficiency Mutual Dual-Band Asymmetric Transmission of Circularly Polarized Waves with Few-Layer Anisotropic Metasurfaces

2016 ◽  
Vol 4 (12) ◽  
pp. 2028-2034 ◽  
Author(s):  
Jieying Liu ◽  
Zhancheng Li ◽  
Wenwei Liu ◽  
Hua Cheng ◽  
Shuqi Chen ◽  
...  
Keyword(s):  
High Efficiency ◽  
Dual Band ◽  
Asymmetric Transmission ◽  
Circularly Polarized ◽  
Polarized Waves

Broadband and High-efficiency Linear Polarization Converter Based on Reflective Metasurface

2020 ◽  
Author(s):  
Yaxian Guo ◽  
◽  
Jianchun Xu ◽  
Chuwen Lan ◽  
Ke Bi ◽  
...  
Keyword(s):  
Linear Polarization ◽  
High Efficiency ◽  
Polarization Converter

scholarly journals High-Efficiency, Dual-Band Beam Splitter Based on an All-Dielectric Quasi-Continuous Metasurface

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3184
Author(s):  
Jing Li ◽  
Yonggang He ◽  
Han Ye ◽  
Tiesheng Wu ◽  
Yumin Liu ◽  
...  
Keyword(s):  
Wavelength Range ◽  
Conversion Efficiency ◽  
Antenna Arrays ◽  
Beam Splitter ◽  
High Efficiency ◽  
Visible Region ◽  
Polarized Light ◽  
Dual Band ◽  
Phase Gradient ◽  
Total Transmission

Metasurface-based beam splitters attracted huge interest for their superior properties compared with conventional ones made of bulk materials. The previously reported designs adopted discrete metasurfaces with the limitation of a discontinuous phase profile. In this paper, we propose a dual-band beam splitter, based on an anisotropic quasi-continuous metasurface, by exploring the optical responses under x-polarized (with an electric field parallel to the direction of the phase gradient) and y-polarized incidences. The adopted metasurface consists of two identical trapezoidal silicon antenna arrays with opposite spatial variations that lead to opposite phase gradients. The operational window of the proposed beam splitter falls in the infrared and visible region, respectively, for x- and y-polarized light, resulting from the different mechanisms. When x-polarized light is incident, the conversion efficiency and total transmission of the beam splitter remains higher than 90% and 0.74 within the wavelength range from 969 nm to 1054 nm, respectively. In this condition, each array can act as a beam splitter of unequal power. For y-polarized incidence, the maximum conversion efficiency and transmission reach approximately 100% and 0.85, while the values remain higher than 90% and 0.65 in the wavelength range from 687 nm to 710 nm, respectively. In this case, each array can be viewed as an effective beam deflector. We anticipate that it can play a key role in future integrated optical devices.

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