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A mechanism of nonlinear dichroism of net gain in vertical-cavity surface-emitting lasers based on polarization-dependent saturation of intersubband absorption in p-contact layers is proposed and analyzed. Microscopic perturbative calculations are used to obtain approximate analytical expressions for the magnitude of the effect. It is shown that the proposed mechanism can play a significant part in polarization switching and bistability in vertical-cavity lasers.
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Ryvkin et al. (2003) studied this question.
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