Antireflection-assisted all-dielectric terahertz metamaterial polarization converter

被引：82

作者：

Zi, Jianchen ^{[1
]}

Xu, Quan ^{[1
]}

Wang, Qiu ^{[1
]}

Tian, Chunxiu ^{[2
]}

Li, Yanfeng ^{[1
]}

Zhang, Xixiang ^{[2
]}

Han, Jiaguang ^{[1
]}

Zhang, Weili ^{[3
]}

机构：

[1] Tianjin Univ, Minist Educ China, Key Lab Optoelect Informat Technol, Ctr Terahertz Waves,Coll Precis Instrument & Opto, Tianjin 300072, Peoples R China

[2] King Abdullah Univ Sci & Technol, Div Phys Sci & Engn, Thuwal 239556900, Saudi Arabia

[3] Oklahoma State Univ, Sch Elect & Comp Engn, Stillwater, OK 74078 USA

来源：

APPLIED PHYSICS LETTERS | 2018年 / 113卷 / 10期

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

WAVE PLATE; HIGH-BIREFRINGENCE; CONVERSION; SPECTROSCOPY; REALIZATION;

D O I：

10.1063/1.5042784

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present a transmissive all-dielectric terahertz (THz) metamaterial half-wave plate with a double-working-layer structure. One layer works as a half-wave plate to enable polarization conversion of the incident THz wave, and the other layer functions as an antireflection layer to improve the transmission. The device is made of pure silicon only and can realize a high-performance polarization conversion at the designed THz frequency. Numerical simulations have been performed to show how the polarization properties of the THz wave can be adjusted by the structural parameters of the metamaterial. With appropriate structural parameters, the transmission for cross-polarization can reach 90%, and the polarization conversion rate can reach almost 100% at the designed operation frequency of 1 THz in simulation. Several samples have been fabricated and characterized, and the experimental results show a cross-polarized transmission of about 80% and a polarization conversion rate of almost 100% and agree well with the simulations. Published by AIP Publishing.

引用

页数：4

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