Temporal and spatial characterization of harmonics structures of relativistic nonlinear Thomson scattering
Optics Express, Vol. 11, Issue 4, pp. 309-316 (2003)
http://dx.doi.org/10.1364/OE.11.000309
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Abstract
The harmonics of the scattering of a femtosecond intense laser pulse by an electron has been numerically investigated. The harmonic spectrum shows interesting red shifts and parasitic lines in the blue sides of harmonic lines. The red shift of the lines is found to be caused by the dilation of laser oscillation experienced by an electron due to its relativistic drift motion along the direction of a driving laser propagation and the parasitic lines come from the variation of the laser intensity. The angular distribution of each higher harmonic line shows double peak patterns in the forward direction. The backward scattering has its own distinct pattern: line-shaped nodes perpendicular to the laser electric field, the number of which is the harmonic order number minus one. As the harmonic order increases, the primary peaks of higher harmonics move from the backward to the forward direction of the laser propagation. In the time domain, each radiation pulse in the case of a linearly-polarized laser pulse has a double peak structure due to the disappearance of the acceleration during the half cycle of an electron’s oscillation.
© 2002 Optical Society of America
[Optical Society of America ]
OCIS Codes
(190.5890) Nonlinear optics : Scattering, stimulated
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
(350.4990) Other areas of optics : Particles
ToC Category:
Research Papers
History
Original Manuscript: December 17, 2002
Revised Manuscript: February 13, 2003
Published: February 24, 2003
Citation
Kitae Lee, Y. Cha, M. Shin, B. Kim, and D. Kim, "Temporal and spatial characterization of harmonics structures of relativistic nonlinear Thomson scattering," Opt. Express 11, 309-316 (2003)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-11-4-309
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