Amplitude Modulation and Demodulation in Strain Dependent Diffusive Semiconductors

• Authors: S. Ghosh , N. Yadav
• Languages of publication: EN

Abstracts

EN

In communication processes, amplitude modulation is very helpful to save power by using a single band transmission. Thus in this paper authors have explored the possibility of amplitude modulation as well as demodulation of an electromagnetic wave in a transversely magnetized electrostrictive semiconductor. The inclusion of carrier diffusion and phenomenological damping coefficient in the nonlinear laser-semiconductor plasma interaction adds a new dimension to the analysis present in this paper. This problem is analyzed in different wave number regimes over a wide range of cyclotron frequencies. It is found that the complete absorption of the waves takes place in all the possible wavelength regimes when the cyclotron frequency (ω_c) becomes exactly equal to (ν^2+ω_0^2)^{1/2} in absence of damping parameter. It has also been seen that diffusion of charge carriers modifies amplitude modulation and demodulation processes significantly. The damping parameter plays a very important role in deciding the parameter range and selecting the side band mode that will be modulated by the above-mentioned interaction.

Keywords

EN

52.35.Mw; 72.50.+b; 66.30.-h

Discipline

• 52.35.Mw: Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.)
• 66.30.-h: Diffusion in solids(for surface and interface diffusion, see 68.35.Fx)
• 72.50.+b: Acoustoelectric effects

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2007
• Volume: 112
• Issue: 1
• Pages: 29-40

Dates

published

2007-07

received

2006-05-29

(unknown)

2007-05-22

Contributors

author

S. Ghosh

• School of Studies in Physics, Vikram University, Ujjain (M.P.), India

author

N. Yadav

• School of Studies in Physics, Vikram University, Ujjain (M.P.), India

References

• 1. R. Muller, Phys. Status Solidi B, 150, 587, 1988
• 2. A. Kumar, P.K. Sen, Nonlinear Opt., 28, 155, 2001
• 3. R. Paiella, R. Martini, F. Capasso, C. Gmachl, H.Y. Hwang, J.N. Baillargeon, D.L. Sivco, A.Y. Cho, E.A. Whittaker, H.C. Liu, Appl. Phys. Lett., 79, 2526, 2001
• 4. M.S. Sodha, C.J. Palumbo, Can. J. Phys., 42, 1635, 1964
• 5. A. Neogi, J. Appl. Phys., 77, 191, 1995
• 6. Giriraj Sharma, S. Ghosh, Eur. Phys. J. D, 11, 301, 2000
• 7. Pradeep K. Gupta, Pranay K. Sen, Nonlinear Opt., 26, 361, 2001
• 8. P.K. Gupta, P.K. Sen, J. Non. Opt. Phys. Mat., 10, 265, 2001
• 9. A. Sen, P.K. Kaw, J. Phys. D, 6, 2091, 1973
• 10. G.P. Agarwal, Nonlinear Fiber Optics, Academic Press, Boston 1984, Sect. 5
• 11. D.R. Anderson, Phys. Rev. A, 37, 189, 1988
• 12. A. Neogi, K.P. Maheshwari, M.S. Sodha, J. Opt. Soc. Am. B, 11, 597, 1994
• 13. P. Vartharajah, J.V. Moloney, A.C. Newell, E.M. Wright, J. Opt. Soc. Am. B, 10, 46, 1993
• 14. P. Vartharajah, A.C. Newell, J.V. Moloney, A.B. Aceves, Phys. Rev. A, 42, 1767, 1990
• 15. A. Yariv, Quantum Electronics, 3rd ed., Wiley, New York 1988, p. 477
• 16. J. Stratton, Electromagnetic Theory, McGraw Hill, New York 1941, p. 151
• 17. L.D. Landau, E.M. Liftshitz, Electrodynamics of Continuous Media, Pergamon Press, Oxford 1963, p. 337
• 18. C.N. Lashmore-Davies, Phys. Fluids, 19, 587, 1976

Identifiers

DOI

10.12693/APhysPolA.112.29