Carrier dynamics in self-assembled ErAs nanoislands embedded in GaAs measured by optical-pump terahertz-probe spectroscopy

被引：50

作者：

Prasankumar, RP

Scopatz, A

Hilton, DJ

Taylor, AJ

Averitt, RD

Zide, JM

Gossard, AC

机构：

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

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

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 20期

关键词：

D O I：

10.1063/1.1923174

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We use optical-pump terahertz (THz)-probe spectroscopy to study carrier dynamics in self-assembled ErAs nanoislands embedded in GaAs and deposited in a superlattice structure. Measurements are performed at several pump fluences on samples with different superlattice periods, enabling a determination of the time-dependent conductivity. Subpicosecond carrier capture times are obtained, indicating the potential of these devices as time-domain THz detectors with performance comparable to low-temperature grown GaAs and superior control of material parameters. (c) 2005 American Institute of Physics.

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页码：1 / 3

页数：3

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