Enhancing the energy of terahertz radiation from plasma produced by intense femtosecond laser pulses

Journal Article · Mon May 13 00:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4804582· OSTI ID:22162915

Jahangiri, Fazel ^[1]; Hashida, Masaki; Tokita, Shigeki; Sakabe, Shuji ^[1]; Nagashima, Takeshi; Hangyo, Masanori ^[2]

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1. Advanced Research Center for Beam Science, ICR, Kyoto University, Kyoto (Japan)
2. Department of Physics, GSS, Kyoto University, Kyoto (Japan)

Terahertz (THz) radiation from atomic clusters illuminated by intense femtosecond laser pulses is investigated. By studying the angular distribution, polarization properties and energy dependence of THz waves, we aim to obtain a proper understanding of the mechanism of THz generation. The properties of THz waves measured in this study differ from those predicted by previously proposed mechanisms. To interpret these properties qualitatively, we propose that the radiation is generated by time-varying quadrupoles, which are produced by the ponderomotive force of the laser pulse.

• OSTI ID: 22162915
• Journal Information: Applied Physics Letters, Vol. 102, Issue 19; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANGULAR DISTRIBUTION
ATOMIC CLUSTERS
ENERGY DEPENDENCE
LASER-PRODUCED PLASMA
NONLINEAR PROBLEMS
PLASMA PRODUCTION
POLARIZATION
PONDEROMOTIVE FORCE
PULSES
QUADRUPOLES
RADIATION SOURCES
THZ RANGE