Abstract

Submilliradian accuracy utilizing terahertz waves is used to often discover and observe novel physical phenomena. However, conventional terahertz polarizers cannot simultaneously realize a high extinction ratio, which restricts the sensitivity of the polarization angle, and a high transmission power across a broad frequency band due to the wires involved. Here, inspired by metamaterials, we demonstrate an anisotropic cut-through metal-slit array for an ideal terahertz polarizer with a high extinction ratio and transmission power. Measurements confirm extinction ratios below approximately $-50\mathrm{dB}$ and average transverse magnetic-mode transmission powers of over 80% from 0.3 to 2.2 THz. The extremely sensitive mechanism can shed light on a variety of path-breaking applications such as single-photon detection and quantum information and communication at lower frequencies.

© 2016 Optical Society of America

Flexible terahertz wire grid polarizer with high extinction ratio and low loss

A. Ferraro, D. C. Zografopoulos, M. Missori, M. Peccianti, R. Caputo, and R. Beccherelli
Opt. Lett. 41(9) 2009-2012 (2016)

Linearly polarized single TM mode terahertz waveguide

Haisu Li, Guobin Ren, Shaghik Atakaramians, Boris T. Kuhlmey, and Shuisheng Jian
Opt. Lett. 41(17) 4004-4007 (2016)

Robust terahertz polarizers with high transmittance at selected frequencies through Si wafer bonding technologies

Ting-Yang Yu, Nai-Chen Chi, Hsin-Cheng Tsai, Shiang-Yu Wang, Chih-Wei Luo, and Kuan-Neng Chen
Opt. Lett. 42(23) 4917-4920 (2017)

Gold triple-helix mid-infrared metamaterial by STED-inspired laser lithography

Johannes Kaschke and Martin Wegener
Opt. Lett. 40(17) 3986-3989 (2015)

Off-resonance and in-resonance metamaterial design for a high-transmission terahertz-wave quarter-wave plate

Zhengli Han, Seigo Ohno, Yu Tokizane, Kouji Nawata, Takashi Notake, Yuma Takida, and Hiroaki Minamide
Opt. Lett. 43(12) 2977-2980 (2018)