Terahertz emission from photoexcited surfaces of Ge crystals

被引：8
|
作者：
Urbanowicz, A [1 ]
Adomavicius, R [1 ]
Krotkus, A [1 ]
机构：
[1] Lithuania Acad Sci, Inst Semicond Phys, LT-01108 Vilnius, Lithuania
来源：
PHYSICA B-CONDENSED MATTER | 2005年 / 367卷 / 1-4期
关键词：
germanium; terahertz radiation; optical pump-terahertz probe; photo-Dember effect;
D O I：
10.1016/j.physb.2005.06.010
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The mechanism of terahertz emission from the surfaces of n- and p-type Ge crystals illuminated by femtosecond Ti:sapphire laser pulses was investigated. It has been concluded that this emission is caused by the cold plasma oscillation activated by a transient polarization arising due to different diffusion rates for photoexcited electrons and holes. The dynamics of those carriers was also investigated with subpicosecond temporal resolution by using an optical pump-terahertz probe technique. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：152 / 157
页数：6
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