High frequency Brillouin scattering in metals and gaseous plasmas |
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Authors: | S Srivastava |
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Institution: | 1. Tata Institute of Fundamental Research, 400005, Bombay
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Abstract: | Spontaneous and stimulated Brillouin scattering are studied in metals and gaseous plasmas, for an incident laser frequencyω 1 greater than the corresponding plasma frequencyω plin the medium. The calculation of threshold powers for the stimulated scattering in aluminium metal and non-degenerate Al-plasmas shows that their values become quite small asω 1 approachesω plFor the case of backward wave scattering we also estimate the critical power above which a temporal instability sets in such media. It is argued that this instability may be one of the factors for anomalously large absorption of high power laser beams in laser-induced plasmas. |
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