Acousto-optic amplitude modulation and demodulation of electromagnetic wave in magnetised diffusive semiconductors |
| |
| Authors: | S. Ghosh M.P. Rishi |
| |
| Affiliation: | (1) School of Studies in Physics, Vikram University, Ujjain-456010, Madhya Pradesh, India, IN |
| |
| Abstract: | Using hydrodynamical model of semiconductor plasma analytical investigations are made for the amplitude modulation as well as demodulation of an electromagnetic wave in a transversely magnetised acousto-optic semiconducting plasma. The inclusion of carriers diffusion adds new dimension in the analysis presented here. Analysis are made under different wave number regions over a wide range of cyclotron frequency. It has been seen that diffusion of charge carriers modifies amplitude modulation and demodulation processes effectively. Numerical estimations are made for n-InSb crystal irradiated by pump wave of frequency 1.6 T s-1. Complete absorption of the waves takes place in all the possible wave lengths regimes when the cyclotron frequency becomes exactly equal to (v 2 + )1/2. Received 28 February 2002 Published online 19 July 2002 |
| |
| Keywords: | PACS. 52.35.Mw Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.) – 78.20.Hp Piezo-, elasto-, and acoustooptical effects photoacoustic effects – 72.30.+q High-frequency effects plasma effects – 42.70.Nq Other nonlinear optical materials photorefractive and semiconductor materials |
| 本文献已被 SpringerLink 等数据库收录！ |
|
