Effect of hot carriers on amplitude modulation and demodulation of an electromagnetic wave in magnetised diffusive semiconductor plasmas

Abstract

Using hydrodynamic model of semiconductor plasma, analytical investigations are made for the amplitude modulation as well as demodulation of an electromagnetic wave in magnetised diffusive semiconductor plasma incorporating carrier heating (CH) effects. The consideration of CH effects in present study adds new dimension to the analysis. This problem is analyzed in different wave number regime over a wide range of cyclotron frequency. Numerical estimations are made for III–V semiconductor crystal irradiated by pump wave of frequency 1.6 × 10−13 s−1. It is found that incorporation of CH effects effectively modifies the amplitude modulation and demodulation processes. It has also been seen that when ka > 2k, both the side bands get modulated whereas for ka < 2k both the side bands get modulated as well as demodulated depending upon the relative magnitudes of cyclotron frequency and pump frequency.