| Autor: |
Agrawal, Ratna, Dubey, Swati, Ghosh, S. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2015, Vol. 1670 Issue 1, p1-6, 6p, 3 Graphs |
| Abstrakt: |
The effect of coupled vibration frequency via excitation of collective cyclotron modes and optical phonons on operational characteristics of doped InSb/CO2 plasma system is studied. Favourable conditions for utilizing this system as optical parametric amplifier under externally applied fields are explored. Within the applied framework a strong tunable electromagnetic Stokes wave may be achieved as signal wave at the expense of the pump wave. Polar optical scattering mechanism has been chosen to be dominant so that coherent polaron modes may be excited through ultra fast excitations. It will enable us to investigate the influence of collective excitation modes on the various optical properties of the medium. Numerical estimations are performed with a set of data appropriate for the said system at liquid nitrogen temperature. Results suggested that the achieved resonance conditions considerably diminish the threshold field required to incite the parametric interaction process. An important finding is that the resonant plasmon cyclotron frequency plays a significant role in the considerable reduction of the threshold field. On the other hand collective excitation effects are found to modify amplification characteristics of the system. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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