Ultrafast optical switching of terahertz metamaterials fabricated on ErAs/GaAs nanoisland superlattices

被引：234

作者：

Chen, Hou-Tong

Padilla, Willie J.

Zide, Joshua M. O.

Bank, Seth R.

Gossard, Arthur C.

Taylor, Antoinette J.

Averitt, Richard D.

机构：

[1] Los Alamos Natl Lab, MPA, CINT, Los Alamos, NM 87545 USA

[2] Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA

[3] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

[4] Boston Univ, Dept Phys, Boston, MA 02215 USA

来源：

OPTICS LETTERS | 2007年 / 32卷 / 12期

关键词：

D O I：

10.1364/OL.32.001620

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate optical switching of electrically resonant terahertz planar metamaterials fabricated on ErAs/GaAs nanoisland superlattice substrates. Photoexcited charge carriers in the superlattice shunt the capacitive regions of the constituent elements, thereby modulating the resonant response of the metamaterials. A switching recovery time of 20 ps results from fast carrier recombination in the ErAs/GaAs superlattice substrates. (c) 2007 Optical Society of America.

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页码：1620 / 1622

页数：3

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