EFFECT OF COHERENT ELECTROMAGNETIC-RADIATION ON THE ULTRAFAST ELECTRON DYNAMICS OF LASER-EXCITED BULK PHOTOCONDUCTORS

被引：4

作者：

JOSHI, RP

DHARAMSI, AN

机构：

[1] Department of Electrical and Computer Engineering, Old Dominion University, Norfolk

来源：

JOURNAL OF APPLIED PHYSICS | 1993年 / 74卷 / 05期

关键词：

D O I：

10.1063/1.354593

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We analyze the role of coherent terahertz radiation on the ultrafast electron dynamics of laser excited photoconductors. Generation of electromagnetic radiation is included within the framework of the usual hot carrier transport theory. A Monte Carlo scheme is used to study the resulting changes in the nonequilibrium electronic energy and transient drift velocity. Our results reveal a density dependent decrease in both quantities, due to reductions in the internal electric fields caused by radiative energy outflow. At densities above 2 X 10(17) cm-3, we obtain a decrease in the transient velocity and expect delays in the onset of phonon emission.

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页码：3215 / 3218

页数：4

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