Screening of the bias field in terahertz generation from photoconductors

被引：55

作者：

Rodriguez, G

Taylor, AJ

机构：

[1] Mat. Science and Technology Division, Los Alamos National Laboratory, Los Alamos

来源：

OPTICS LETTERS | 1996年 / 21卷 / 14期

关键词：

D O I：

10.1364/OL.21.001046

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We include screening of the bias field by the space charge induced by carrier transport and by the generated terahertz radiation in a model describing the far-field electromagnetic radiation from a large-aperture biased photoconductor triggered by an ultrashort optical pulse. At high fluences, space-charge screening is shown to produce bipolar terahertz waveforms. However, the dominant saturation mechanism is screening of the bias field by the radiated terahertz field. (C) 1996 Optical Society of America

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页码：1046 / 1048

页数：3

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