An electrically driven terahertz metamaterial diffractive modulator with more than 20 dB of dynamic range

被引：87

作者：

Karl, N. ^{[1
]}

Reichel, K. ^{[1
]}

Chen, H. -T. ^{[2
]}

Taylor, A. J. ^{[2
]}

Brener, I. ^{[3
]}

Benz, A. ^{[3
]}

Reno, J. L. ^{[3
]}

Mendis, R. ^{[1
]}

Mittleman, D. 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 | 2014年 / 104卷 / 09期

基金：

美国国家科学基金会;

关键词：

PHASE MODULATOR; TRANSMISSION; INDEX;

D O I：

10.1063/1.4867276

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We design and experimentally demonstrate a switchable diffraction grating for terahertz modulation based on planar active metamaterials, where a Schottky gate structure is implemented to tune the metamaterial resonances in real-time via the application of an external voltage bias. The diffraction grating is formed by grouping the active split-ring resonators into an array of independent columns with alternate columns biased. We observe off-axis diffraction over a wide frequency band in contrast to the narrow-band resonances, which permits operation of the device as a relatively high-speed, wide-bandwidth, high-contrast modulator, with more than 20 dB of dynamic range. (C) 2014 AIP Publishing LLC.

引用

页数：4

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