Emission of terahertz waves in the interaction of a laser pulse with clusters

Journal Article · Fri Jul 15 04:00:00 EDT 2016 · Plasma Physics Reports

DOI:https://doi.org/10.1134/S1063780X16070035· OSTI ID:22614111

A theory of generation of terahertz radiation in the interaction of a femtosecond laser pulse with a spherical cluster is developed for the case in which the density of free electrons in the cluster plasma exceeds the critical value. The spectral, angular, and energy characteristics of the emitted terahertz radiation are investigated, as well as its spatiotemporal structure. It is shown that the directional pattern of radiation has a quadrupole structure and that the emission spectrum has a broad maximum at a frequency nearly equal to the reciprocal of the laser pulse duration. It is found that the total radiated energy depends strongly on the cluster size. Analysis of the spatiotemporal profile of the terahertz signal shows that it has a femtosecond duration and contains only two oscillation cycles.

• OSTI ID: 22614111
• Journal Information: Plasma Physics Reports, Journal Name: Plasma Physics Reports Journal Issue: 7 Vol. 42; ISSN PPHREM; ISSN 1063-780X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRON DENSITY
ELECTRONS
EMISSION SPECTRA
LASER RADIATION
OSCILLATIONS
PLASMA
PULSES
QUADRUPOLES
SHORT WAVE RADIATION
SPHERICAL CONFIGURATION
THZ RANGE
WAVE PROPAGATION