Strong terahertz emission from electromagnetic diffusion near cutoff in plasma

被引：42
作者：
Cho, M-H [1 ,6 ]
Kim, Y-K [2 ]
Suk, H. [3 ]
Ersfeld, B. [4 ,5 ]
Jaroszynski, D. A. [4 ,5 ]
Hur, M. S. [1 ]
机构：
[1] UNIST, Sch Nat Sci, Ulsan 689798, South Korea
[2] UNIST, Sch Elect & Comp Engn, Ulsan 689798, South Korea
[3] GIST, Dept Phys & Photon Sci, Gwangju 500712, South Korea
[4] Scottish Univ Phys Alliance, Dept Phys, Glasgow G4 0NG, Lanark, Scotland
[5] Univ Strathclyde, Glasgow G4 0NG, Lanark, Scotland
[6] Inst Basic Sci, Ctr Relativist Laser Sci, Gwangju 500712, South Korea
来源：
NEW JOURNAL OF PHYSICS | 2015年 / 17卷
基金：
新加坡国家研究基金会; 英国工程与自然科学研究理事会;
关键词：
laser-plasma; terahertz radiation; laser wakefield; PHOTOCONDUCTING ANTENNAS; MAGNETIZED PLASMA; RADIATION; GENERATION; PULSES; AIR; WAKES;
D O I：
10.1088/1367-2630/17/4/043045
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Anew mechanism for electromagnetic emission in the terahertz (THz) frequency regime from laser-plasma interactions is described. A localized and long-lasting transverse current is produced by two counter-propagating short laser pulses in weakly magnetized plasma. We show that the electromagnetic wave radiating from this current source, even though its frequency is close to cut-off of the ambient plasma, grows and diffuses towards the plasma-vacuum boundary, emitting a strong monochromatic THz wave. With driving laser pulses of moderate power, the THz wave has a field strength of tens of MV m(-1), a frequency of a few THz and a quasi-continuous power that exceeds all previous monochromatic THz sources. The novelty of the mechanism lies in a diffusing electromagnetic wave close to cut-off, which is modelled by a continuously driven complex diffusion equation.
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页数：8
相关论文
共 31 条
[1]   Tailoring terahertz radiation by controlling tunnel photoionization events in gases [J].
Babushkin, I. ;
Skupin, S. ;
Husakou, A. ;
Koehler, C. ;
Cabrera-Granado, E. ;
Berge, L. ;
Herrmann, J. .
NEW JOURNAL OF PHYSICS, 2011, 13
[2]   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)
[3]   3D Numerical Simulations of THz Generation by Two-Color Laser Filaments [J].
Berge, Luc ;
Skupin, Stefan ;
Koehler, Christian ;
Babushkin, Ihar ;
Herrmann, Joachim .
PHYSICAL REVIEW LETTERS, 2013, 110 (07)
[4]   Simultaneous Cotton-Mouton and Faraday rotation angle measurements on JET [J].
Boboc, A. ;
Zabeo, L. ;
Murari, A. .
REVIEW OF SCIENTIFIC INSTRUMENTS, 2006, 77 (10)
[5]   Terahertz radiation from oscillating electrons in laser-induced wake fields [J].
Cao, Li-Hua ;
Yu, Wei ;
Xu, Han ;
Zheng, Chun-Yang ;
Liu, Zhan-Jun ;
Li, Bin ;
Bogaerts, A. .
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 2004, 70 (4 2) :046408-1
[6]   Comment on "Generation of electromagnetic pulses from plasma channels induced by femtosecond light strings" - Reply [J].
Cheng, CC ;
Wright, EM ;
Moloney, JV .
PHYSICAL REVIEW LETTERS, 2002, 89 (13)
[7]   Generation of electromagnetic pulses from plasma channels induced by femtosecond light strings [J].
Cheng, CC ;
Wright, EM ;
Moloney, JV .
PHYSICAL REVIEW LETTERS, 2001, 87 (21) :213001-1
[8]   Wavelength Scaling of Terahertz Generation by Gas Ionization [J].
Clerici, Matteo ;
Peccianti, Marco ;
Schmidt, Bruno E. ;
Caspani, Lucia ;
Shalaby, Mostafa ;
Giguere, Mathieu ;
Lotti, Antonio ;
Couairon, Arnaud ;
Legare, Francois ;
Ozaki, Tsuneyuki ;
Faccio, Daniele ;
Morandotti, Roberto .
PHYSICAL REVIEW LETTERS, 2013, 110 (25)
[9]   Intense terahertz pulses by four-wave rectification in air [J].
Cook, DJ ;
Hochstrasser, RM .
OPTICS LETTERS, 2000, 25 (16) :1210-1212
[10]   Analytical model for THz emissions induced by laser-gas interaction [J].
Debayle, A. ;
Gremillet, L. ;
Berge, L. ;
Koehler, Ch. .
OPTICS EXPRESS, 2014, 22 (11) :13691-13709
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