Stochastic polarization switching induced by optical injection in bimodal quantum-dot micropillar lasers

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Schlottmann, Elisabeth
Schicke, David
Krüger, Felix
Lingnau, Benjamin
Schneider, Christian
Höfling, Sven
Lüdge, Kathy
Porte, Xavier
Reitzenstein, Stephan
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Optical Society of America
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Mutual coupling and injection locking of semiconductor lasers is of great interest in non-linear dynamics and its applications for instance in secure data communication and photonic reservoir computing. Despite its importance, it has hardly been studied in microlasers operating at μW light levels. In this context, vertically emitting quantum dot micropillar lasers are of high interest. Usually, their light emission is bimodal, and the gain competition of the associated linearly polarized fundamental emission modes results in complex switching dynamics. We report on selective optical injection into either one of the two fundamental mode components of a bimodal micropillar laser. Both modes can lock to the master laser and influence the non-injected mode by reducing the available gain. We demonstrate that the switching dynamics can be tailored externally via optical injection in very good agreement with our theory based on semi-classical rate equations.
Laser modes , Optical feedback , Quantum dot lasers , Single mode lasers , Spontaneous emission , Tunable lasers
Schlottmann, E., Schicke, D., Krüger, F., Lingnau, B., Schneider, C., Höfling, S., Lüdge, K., Porte, X. and Reitzenstein, S. (2019) 'Stochastic polarization switching induced by optical injection in bimodal quantum-dot micropillar lasers', Optics Express, 27(20), pp. 28816-28831. DOI: 10.1364/OE.27.028816