Enhanced focusing of laser beams in semiconductor plasmas

被引：17
|
作者：
Gupta, D. N. [1 ]
Suk, H. [1 ]
机构：
[1] Korea Electrotechnol Res Inst, Ctr Adv Accelerators, Chang Won 641120, South Korea
来源：
JOURNAL OF APPLIED PHYSICS | 2007年 / 101卷 / 04期
关键词：
D O I：
10.1063/1.2654873
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The beating of two copropagating laser beams (having frequency difference Delta omega approximate to omega(p), where omega(p) is the plasma frequency) can resonantly excite a large amplitude plasma wave in a narrow-gap semiconductor [V. I. Berezhiani and S. M. Mahajan, Phys. Rev. B 55, 9247 (1997)]. The higher ponderomotive force on the electrons due to the plasma beat wave makes the medium highly nonlinear. As a result, the incident laser beams become self-focused due to the nonlinearity by the ponderomotive force. In this paper, we show the self-focusing and spot size evolution of the laser beams in semiconductor plasmas.
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页数：4
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