Diffusion-induced modulational instability in magnetised semiconductor plasmas: effect of carrier heating
School of Studies in Physics, Vikram University, 456010, Ujjain, Madhya Pradesh, India
Corresponding author: a email@example.com
Published online: 12 May 2010
The present paper is aimed to the exploration of modulational amplification in transversely magnetised diffusive semiconductors. By considering that the origin of modulational interaction lies in the third-order optical susceptibility arising from the nonlinear diffusion current density and using coupled mode theory, an analytical investigation of frequency modulational interaction between co-propagating laser beams and internally generated acoustic mode is presented. We have studied the steady state and transient amplification characteristics of modulated waves arising in the transversely magnetised semiconductor plasmas. The effect of carrier heating adds new dimensions to the present study. The heating effect reduces the required threshold amplitude of wave and enhances steady-state as well as transient gain of the generated acoustic mode.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2010