A microscopic theory is used to analyze optical gain in small semiconductor quantum dots. Based on a numerical matrix diagonalization method and subsequent solution of the optical Bloch equations, it is found that the quantum-dot gain is dominated by the stimulated transitions between biexciton and exciton states. The calculation shows that Coulomb interaction and valence-band mixing effects significantly influence the spectral and dynamic gain properties in strongly confined quantum dots. {} 1996 The American Physical Society.
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Hu et al. (1996) studied this question.
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