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http://nopr.niscpr.res.in/handle/123456789/26727| Title: | Nonlinear interactions in magnetised piezoelectric semiconductor plasmas |
| Authors: | Sharma, Giriraj Ghosh, S |
| Issue Date: | Feb-2000 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Based on hydrodynamic model of plasmas an analytical investigation of frequency modulational interaction between co-propagating high frequency pump and acoustic mode and consequent amplification (steady-state and transient) of the modulated waves is carried out in a magnetised piezoelectric semiconductor medium. The phenomenon of modulational amplification is treated has, four wave interaction process involving cubic nonlinearity of the medium. Gain constants, threshold -pump intensities, and optimum pulse duration for the onset of moduational instabilities are estimated. The analysis has been performed in non-dispersive regime of the acoustic mode, which is one of the preconditions for achieving an appreciable initial steady-state growth of the modulated signal wave it is found that the transient gain diminishes very rapidly if one chooses the pump pulse duration beyond the maximum gain point. Moreover, the desired value or the gain can he obtained by adjusting intensity & pulse duration of the pump and doping concent ration of the medium concerned. |
| Page(s): | 139-145 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Appears in Collections: | IJPAP Vol.38(02) [February 2000] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJPAP 38(2) 139-145.pdf | 1.36 MB | Adobe PDF | View/Open |
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