Ultrafast dynamics of plasmon-phonon coupling: Estimation of electron mobility in GaAs

被引：3

作者：

Hase, Muneaki ^{[1
]}

机构：

[1] Univ Tsukuba, Inst Appl Phys, Tsukuba, Ibaraki 3058573, Japan

来源：

PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 5, NO 1 | 2008年 / 5卷 / 01期

关键词：

D O I：

10.1002/pssc.200776550

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Utilizing a femtosecond pump-probe technique, ultrafast relaxation of plasmon-like LO phonon-plasmon coupled (LOPC) modes is studied. The time-resolved reflectivity change exhibits strong mode beating between the LO phonon and the lower branch of the LOPC modes. It is revealed that the decay of the upper branch (or plasmon-like mode) of the coupled modes is very rapid in time-frequency space, explored by using wavelet analysis. The decay time of the plasmon-like LOPC mode, which corresponds to the relaxation time tau, is obtained to be similar to 79 fs and this time constant enables us to extract the electron mobility mu to be 2074 +/- 200 cm(2)/Vs. (c) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：364 / 366

页数：3

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