Effect of preformed plasma on terahertz-wave emission from the plasma generated by two-color laser pulses

被引：43

作者：

Minami, Yasuo ^{[1
]}

Nakajima, Makoto ^{[1
]}

Suemoto, Tohru ^{[1
]}

机构：

[1] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

来源：

PHYSICAL REVIEW A | 2011年 / 83卷 / 02期

关键词：

AIR; SUBPICOSECOND; RECTIFICATION; RADIATION;

D O I：

10.1103/PhysRevA.83.023828

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We introduced a weak prepulse 0-2 ns before the main pulse in the formation of a terahertz (THz) wave in air plasma by laser pulses composed of fundamental and second-harmonic waves. The prepulse suppressed the THz wave generated by the main pulse. We analyzed the suppression factor as a function of the time interval between the prepulse and the main pulse and found that the THz wave from the main pulse decreases immediately after the prepulse, recovers partially within several hundred picoseconds, and then recovers slowly. This suppression is attributed to the dense plasma, which absorbs and screens the generated THz wave, since the relaxation time is close to the lifetime of the fluorescence from the plasma. The results support the idea that the major mechanism of THz wave generation is explained by the plasma current model.

引用

页数：4

共 28 条

[1] Ultrafast Spatiotemporal Dynamics of Terahertz Generation by Ionizing Two-Color Femtosecond Pulses in Gases [J].

Babushkin, I. ;

Kuehn, W. ;

Koehler, C. ;

Skupin, S. ;

Berge, L. ;

Reimann, K. ;

Woerner, M. ;

Herrmann, J. ;

Elsaesser, T. .

PHYSICAL REVIEW LETTERS, 2010, 105 (05)

[2] Broadband antireflective surface-relief structure for THz optics [J].

Brueckner, Claudia ;

Pradarutti, Boris ;

Stenzel, Olaf ;

Steinkopf, Ralf ;

Riehemann, Stefan ;

Notni, Gunther ;

Tuennermann, Andreas .

OPTICS EXPRESS, 2007, 15 (03) :779-789

[3]

Chen F. F., 1974, Introduction to plasma physics

[4] Intense terahertz pulses by four-wave rectification in air [J].

Cook, DJ ;

Hochstrasser, RM .

OPTICS LETTERS, 2000, 25 (16) :1210-1212

[5] Analysis of nonlinear self-interaction of femtosecond pulses during high-order harmonic generation in laser-produced plasma [J].

Ganeev, Rashid A. ;

Baba, Motoyoshi ;

Suzuki, Masayuki ;

Kuroda, Hiroto .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 2006, 23 (07) :1332-1337

[6] Single and double ionization of diatomic molecules in strong laser fields [J].

Guo, C ;

Li, M ;

Nibarger, JP ;

Gibson, GN .

PHYSICAL REVIEW A, 1998, 58 (06) :R4271-R4274

[7] 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

[8] 2D measurement and spatio-temporal coupling of few-cycle THz pulses [J].

Jiang, ZP ;

Zhang, XC .

OPTICS EXPRESS, 1999, 5 (11) :243-248

[9] Terahertz emission from ultrafast ionizing air in symmetry-broken laser fields [J].

Kim, K. Y. ;

Glownia, J. H. ;

Taylor, A. J. ;

Rodriguez, G. .

OPTICS EXPRESS, 2007, 15 (08) :4577-4584

[10] Generation and detection of terahertz coherent transverse-polarized acoustic phonons by ultrafast optical excitation of GaAs/AlAs superlattices [J].

Kini, RN ;

Kent, AJ ;

Stanton, NM ;

Henini, M .

APPLIED PHYSICS LETTERS, 2006, 88 (13)

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