Multiplasmon laser gain in low-dimensional systems |
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Authors: | A A Klyukanov V Gurau |
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Affiliation: | (1) Department of Physics, State University of Moldova, ul. Matteevicha 60, Chisinau, 2009, Moldova |
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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 nd0 = 1.64 × 1012 cm?2. |
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