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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/2028

Title: Second-harmonic generation of a Gaussian laser beam in a self created magnetized plasma channel
Authors: Salih, H A
Tripathi, V K
Pandey, B K
Keywords: radial ponderomotive force
electron cyclotron
azimuthally asymmetric
Issue Date: 2003
Citation: Plasma Science, IEEE Transactions on, 31(3), 324 - 328p.
Abstract: The second-harmonic generation of an intense self-guided right circularly polarized laser beam in a magnetized plasma is investigated. The laser imparts oscillatory velocity to electrons and exerts a radial ponderomotive force on them to create a depleted density channel. The critical power for self-focusing shows huge reduction as electron cyclotron frequency approaches the laser frequency (/spl omega//sub c/ /spl rarr/ /spl omega/). In the presence of the self-created radial density gradient, the laser drives a density perturbation at the fundamental frequency. The density perturbation beats with the oscillatory velocity to produce a second harmonic current density, driving second harmonic radiation copropagating with the laser. The second harmonic, however, is azimuthally asymmetric with /spl theta/-variation as exp(i/spl theta/). Its amplitude shows resonant enhancement as /spl omega//sub c/ /spl rarr/ /spl omega/.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/2028
Appears in Collections:Physics

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