A spatial light modulator for terahertz beams

被引：296

作者：

Chan, Wai Lam ^{[1
]}

Chen, Hou-Tong ^{[2
]}

Taylor, Antoinette J. ^{[2
]}

Brener, Igal ^{[3
]}

Cich, Michael J.

Mittleman, Daniel M. ^{[1
]}

机构：

[1] Rice Univ, Dept Elect & Comp Engn, Houston, TX 77251 USA

[2] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA

[3] Sandia Natl Labs, Ctr Integrated Nanotechnol, Albuquerque, NM 87185 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 21期

基金：

美国国家科学基金会;

关键词：

metamaterials; spatial light modulators; METAMATERIAL; TRANSMISSION;

D O I：

10.1063/1.3147221

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We design and implement a multipixel spatial modulator for terahertz beams using active terahertz metamaterials. Our first-generation device consists of a 4x4 pixel array, where each pixel is an array of subwavelength-sized split-ring resonator elements fabricated on a semiconductor substrate, and is independently controlled by applying an external voltage. Through terahertz transmission experiments, we show that the spatial modulator has a uniform modulation depth of around 40% across all pixels, and negligible crosstalk, at the resonant frequency. This device can operate under small voltage levels, at room temperature, with low power consumption and reasonably high switching speed.

引用

页数：3

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