Abstract
The light absorption and laser gain in quantum wells are calculated using the cumulant expansion method and the fluctuation-dissipation theorem with allowance made for the strong Coulomb interaction of charge carriers. It is shown that the multiplasmon transitions result in a smoothening of the absorption spectrum and a shift in the absorption edge toward the long-wavelength range. The theoretical laser gain spectra are in agreement with the available experimental data. For In0.05Ga0.95As quantum wells, the laser gain g = 50 cm−1 is reached at an electron density nd 0 = 1.64 × 1012 cm−2.
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Translated from Fizika Tverdogo Tela, Vol. 47, No. 9, 2005, pp. 1695–1697.
Original Russian Text Copyright © 2005 by Klyukanov, Gurau.
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Klyukanov, A.A., Gurau, V. Multiplasmon laser gain in low-dimensional systems. Phys. Solid State 47, 1761–1763 (2005). https://doi.org/10.1134/1.2045364
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DOI: https://doi.org/10.1134/1.2045364