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

收藏

页码：1210 / 1212

页数：3

相关论文

共 9 条

[1] Distortion of terahertz pulses in electro-optic sampling [J].

Bakker, HJ ;

Cho, GC ;

Kurz, H ;

Wu, Q ;

Zhang, XC .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 1998, 15 (06) :1795-1801

[2] Terahertz-field-induced second-harmonic generation measurements of liquid dynamics [J].

Cook, DJ ;

Chen, JX ;

Morlino, EA ;

Hochstrasser, RM .

CHEMICAL PHYSICS LETTERS, 1999, 309 (3-4) :221-228

[3] THz emission from coherently controlled photocurrents in GaAs [J].

Coté, D ;

Fraser, JM ;

DeCamp, M ;

Bucksbaum, PH ;

van Driel, HM .

APPLIED PHYSICS LETTERS, 1999, 75 (25) :3959-3961

[4] SUBPICOSECOND ELECTROMAGNETIC PULSES FROM LARGE-APERTURE PHOTOCONDUCTING ANTENNAS [J].

DARROW, JT ;

HU, BB ;

ZHANG, XC ;

AUSTON, DH .

OPTICS LETTERS, 1990, 15 (06) :323-325

[5] SUBPICOSECOND, ELECTROMAGNETIC PULSES FROM INTENSE LASER-PLASMA INTERACTION [J].

HAMSTER, H ;

SULLIVAN, A ;

GORDON, S ;

WHITE, W ;

FALCONE, RW .

PHYSICAL REVIEW LETTERS, 1993, 71 (17) :2725-2728

[6] NONLINEAR-OPTICAL SUSCEPTIBILITIES OF GASES MEASURED AT 1064 AND 1319 NM [J].

SHELTON, DP .

PHYSICAL REVIEW A, 1990, 42 (05) :2578-2592

[7] Semi-empirical model for the rate of tunnel ionization of N2 and O2 molecule in an intense Ti:sapphire laser pulse [J].

Talebpour, A ;

Yang, J ;

Chin, SL .

OPTICS COMMUNICATIONS, 1999, 163 (1-3) :29-32

[8] Electro-optic detection of THz radiation in LiTaO3, LiNbO3, and ZnTe [J].

Winnewisser, C ;

Jepsen, PU ;

Schall, M ;

Schyja, V ;

Helm, H .

APPLIED PHYSICS LETTERS, 1997, 70 (23) :3069-3071

[9] COHERENT MEASUREMENT OF THZ OPTICAL RECTIFICATION FROM ELECTROOPTIC CRYSTALS [J].

ZHANG, XC ;

JIN, Y ;

MA, XF .

APPLIED PHYSICS LETTERS, 1992, 61 (23) :2764-2766