Optimum excitation conditions for the generation of high-electric-field terahertz radiation from an oscillator-driven photoconductive device

被引：48

作者：

Dreyhaupt, A

Winnerl, S

Helm, M

Dekorsy, T

机构：

[1] Forschungszentrum Rossendorf EV, Inst Ion Beam Phys & Mat Res, D-01314 Dresden, Germany

[2] Univ Konstanz, Fachbereich Phys, D-78457 Constance, Germany

来源：

OPTICS LETTERS | 2006年 / 31卷 / 10期

关键词：

D O I：

10.1364/OL.31.001546

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report the impulsive generation of terahertz (THz) radiation with a field amplitude of more than 1.5 kV/cm at megahertz repetition rates, using an interdigitated photoconducting device. The approach provides an average THz power of 190 mu W, corresponding to an optical-to-THz conversion efficiency of 2.5 X 10(-4). Optimum conditions are achieved when the excitation spot size is of the order of the THz wavelength. (c) 2006 Optical Society of America.

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页码：1546 / 1548

页数：3

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