Intense terahertz pulses by four-wave rectification in air

被引：955

作者：

Cook, DJ ^{[1
]}

Hochstrasser, RM ^{[1
]}

机构：

[1] Univ Penn, Dept Chem, Philadelphia, PA 19104 USA

来源：

OPTICS LETTERS | 2000年 / 25卷 / 16期

关键词：

D O I：

10.1364/OL.25.001210

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We describe a new four-wave rectification method for the generation of intense, ultrafast terahertz (THz) pulses from gases. The fundamental and second-harmonic output of an amplified Ti:sapphire laser is focused to a peak intensity of similar to 5 x 10(14) W/cm(2). Under these conditions, peak THz fields estimated at 2 kV/cm have been observed; the measured power spectrum peaks near 2 THz. Phase-dependent measurements show that this is a coherent process and is sensitive to the relative phases of the fundamental and second-harmonic pulses. Comparable THz signals have been observed from nitrogen and argon as well as from air. (C) 2000 Optical Society of America. OCIS codes: 320.7110, 320.7160, 190.4380, 260.3090.

引用

页码：1210 / 1212

页数：3

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