Control of carrier transport in GaAs by longitudinal-optical phonon-carrier scattering using a pair of laser pump pulses

被引：3
|
作者：
Hase, Muneaki [1 ]
Hayashi, Daisuke [1 ]
Lee, J. D. [2 ]
机构：
[1] Univ Tsukuba, Inst Appl Phys, Tsukuba, Ibaraki 3058573, Japan
[2] Japan Adv Inst Sci & Technol, Sch Mat Sci, Nomi, Ishikawa 9231292, Japan
来源：
JOURNAL OF APPLIED PHYSICS | 2011年 / 109卷 / 07期
关键词：
BALLISTIC TRANSPORT; COUPLED MODES; DOPED GAAS; N-TYPE; COHERENT; DYNAMICS; GENERATION; PLASMONS; ELECTRON; GRAPHENE;
D O I：
10.1063/1.3562188
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We demonstrate optical control of the LO phonon-plasmon coupled (LOPC) modes in GaAs by using a femtosecond pump-pulse pair. The relaxation time of the plasmonlike LOPC mode significantly depends on the separation time (Delta t) of the pump-pulse pair. Especially it is maximized when Delta t becomes simultaneously comparable to the half period of the longitudinal optical (LO) phonon oscillation and resonant to the 3/4 period of the plasmonlike LOPC oscillation. We attribute these observations to the modification of carrier-LO phonon scattering and ballistic motion of the plasmonlike LOPC mode. (C) 2011 American Institute of Physics. [doi:10.1063/1.3562188]
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页数：4
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