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Relevance of intra- and inter-subband scattering on the absorption in heterostructures (1207.7289v3)
Published 31 Jul 2012 in cond-mat.mes-hall
Abstract: We analyze the absorption lineshape for inter-subband transitions in disordered quasi 2D heterostructures by an exact calculation. The intra-subband scatterings control the central peak while the tails of the absorption line are dominated by the inter-subband scattering terms. Our numerical study quantitatively assesses the magnitude of the free carrier absorption. The accuracy of different models currently used for gain/absorption is discussed.
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