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MULTIPLASMON LASER GAIN SPECTRA OF QUANTUM WELLS

A. A. Klyukanov1,* , V. Gurau1

Affiliation

  1. State University of Moldova, Department of Physics, Kishinau, MD-2009, Mateevici 60, Moldova

Abstract

Results of computer simulations concerning gain spectra of In0.05Ga0.95As quantum wells are presented. A novel multi-plasmon concept of a light absorption and laser gain of low dimensional structures is comprehensively discussed. A generalized theory of multi-plasmon optical transitions in direct gap quantum wells is developed using the cumulant expansion method and fluctuation-dissipation theorem. Multi-quantum LO-phonon-plasmon optical transitions are investigated with account on coherent memory effects in quantum wells. It is shown that a red shift of the absorption edge can be caused not only by the well-known mechanism of band gap shrinkage but also by multi-plasmon transitions. The comparison with other theories and experimental data measured in In0.05Ga0.95As quantum wells is given..

Keywords

Quantum wells, Multi-plasmon – optical transitions, Light absorption, Laser gain.

Submitted at: Aug. 20, 2004
Accepted at: March 23, 2005

Citation

A. A. Klyukanov, V. Gurau, MULTIPLASMON LASER GAIN SPECTRA OF QUANTUM WELLS, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 2, pp. 871-875 (2005)