Tunable split-ring resonator for metamaterials using photocapacitance of semi-insulating GaAs

被引：31

作者：

Boulais, K. A. ^{[1
]}

Rule, D. W. ^{[2
]}

Simmons, S. ^{[2
]}

Santiago, F. ^{[1
]}

Gehman, V. ^{[1
]}

Long, K. ^{[1
]}

Rayms-Keller, A. ^{[1
]}

机构：

[1] Naval Surface Warfare Ctr Dahlgren, Dahlgren, VA 22448 USA

[2] Naval Surface Warfare Ctr Carderock, Bethesda, MD 20817 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 04期

关键词：

D O I：

10.1063/1.2967192

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report a method for tuning a split-ring resonator (SRR) using infrared light. The SRR unit cells are commonly used in arrays to form a metamaterial that exhibits an effective negative permeability and are often used in negative-refractive-index materials. The region of negative permeability is generally limited to a narrow bandwidth at a fixed frequency. In this work, we use photocapacitance as observed in undoped semi-insulating GaAs to modify the gap capacitance of a SRR. We demonstrate a continuously tunable frequency over the range of 0.1-1.5 GHz using a 975 nm laser diode with a power range of 0-189 mW. (c) 2008 American Institute of Physics.

引用

页数：3

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