Enhancement of Laser-Induced Fluorescence by Intense Terahertz Pulses in Gases

被引：11

作者：

Liu, Jingle ^{[1
]}

Zhang, Xi-Cheng ^{[1
]}

机构：

[1] Rensselaer Polytech Inst, Ctr Terahertz Res, Troy, NY 12180 USA

来源：

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS | 2011年 / 17卷 / 01期

基金：

美国国家科学基金会;

关键词：

Alkane gas; fluorescence; impact ionization; laser-induced plasma; noble gas; terahertz (THz) wave; DISSOCIATIVE PHOTOIONIZATION; HARMONIC-GENERATION; RARE-GASES; AIR; FIELD; FILAMENTATION; SPECTROSCOPY; IONIZATION; RADIATION; PRESSURE;

D O I：

10.1109/JSTQE.2010.2046142

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The enhancement of laser-induced fluorescence by intense terahertz pulses was studied both theoretically and experimentally using selected gases. Semiclassical physical picture incorporating photoionization, electron heating, impact excitation, and dissociative recombination was used to explain the plasma dynamics under terahertz radiation in picosecond scale. The dependences of enhanced fluorescence on the terahertz field, laser intensity, and atomic properties were systematically investigated with neon, argon, krypton, xenon, methane (CH(4)), ethane (C(2)H(6)), propane (C(3)H(8)), and n-butane (C(4)H(10)) gases. In noble gas plasma, both narrow line emission and broad continuum emission were found to be enhanced by the terahertz field. Their enhancement ratios and time-dependent enhanced fluorescence are greatly influenced by the scattering cross section and ionization potential of atoms. In alkane gas plasma, the enhancement of the fluorescence emission from various molecular fragments was also observed.

引用

页码：229 / 236

页数：8

共 27 条

[1] THE MOLECULAR AND DISSOCIATIVE PHOTOIONIZATION OF ETHANE, PROPANE, AND N-BUTANE - ABSOLUTE OSCILLATOR-STRENGTHS (10-80 EV) AND BREAKDOWN PATHWAYS [J].

AU, JW ;

COOPER, G ;

BRION, CE .

CHEMICAL PHYSICS, 1993, 173 (02) :241-265

[2] TUNNELING IONIZATION OF NOBLE-GASES IN A HIGH-INTENSITY LASER FIELD [J].

AUGST, S ;

STRICKLAND, D ;

MEYERHOFER, DD ;

CHIN, SL ;

EBERLY, JH .

PHYSICAL REVIEW LETTERS, 1989, 63 (20) :2212-2215

[3] Generation of single-cycle THz transients with high electric-field amplitudes [J].

Bartel, T ;

Gaal, P ;

Reimann, K ;

Woerner, M ;

Elsaesser, T .

OPTICS LETTERS, 2005, 30 (20) :2805-2807

[4] Spectroscopic analysis of femtosecond laser plasma filament in air [J].

Bernhardt, J. ;

Liu, W. ;

Theberge, F. ;

Xu, H. L. ;

Daigle, J. F. ;

Chateauneuf, M. ;

Dubois, J. ;

Chin, S. L. .

OPTICS COMMUNICATIONS, 2008, 281 (05) :1268-1274

[5] Continuum visible spectra from InBr discharge excited in a microwave resonant cavity [J].

Chen, Yuming ;

Chen, Dahua .

APPLIED PHYSICS LETTERS, 2007, 91 (16)

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

Cook, DJ ;

Hochstrasser, RM .

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

[7] PLASMA PERSPECTIVE ON STRONG-FIELD MULTIPHOTON IONIZATION [J].

CORKUM, PB .

PHYSICAL REVIEW LETTERS, 1993, 71 (13) :1994-1997

[8] Femtosecond filamentation in transparent media [J].

Couairon, A. ;

Mysyrowicz, A. .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2007, 441 (2-4) :47-189

[9] ADIABATIC STABILIZATION AGAINST PHOTOIONIZATION - AN EXPERIMENTAL-STUDY [J].

DEBOER, MP ;

HOOGENRAAD, JH ;

VRIJEN, RB ;

CONSTANTINESCU, RC ;

NOORDAM, LD ;

MULLER, HG .

PHYSICAL REVIEW A, 1994, 50 (05) :4085-4098

[10] High-power THz generation, THz nonlinear optics, and THz nonlinear spectroscopy [J].

Hebling, Janos ;

Yeh, Ka-Lo ;

Hoffmann, Matthias C. ;

Nelson, Keith A. .

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, 2008, 14 (02) :345-353

← 1 2 3 →