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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