Journal
IEEE JOURNAL OF QUANTUM ELECTRONICS
Volume 40, Issue 2, Pages 97-104Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JQE.2003.821537
Keywords
polarization dynamics; vertical-cavity surface-emitting lasers
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We report on the experimental observation of current-induced polarization switching in vertical-cavity surface-emitting lasers which is accompanied by a decrease of the total output power at the switching point. The relaxation oscillation frequency also decreases. This switching is interpreted as a switching event from the mode with higher (unsaturated) net gain to the gain disfavored mode. The experimental observations are in qualitative agreement with a nonlinear dynamical model taking into account spin degrees of freedom of carriers in a semiconductor quantum well. Within the framework of this model, we propose an explanation for the origin of a minimum in the effective dichroism observed at the switching point, which might also be relevant for other experiments.
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