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HL: Fachverband Halbleiterphysik

HL 18: Quantum dots and wires I

HL 18.7: Vortrag

Montag, 16. März 2020, 17:15–17:30, POT 151

Radiative coupling between quantum-dot emitters in bimodal microcavity lasers — •Isa Hedda Grothe and Jan Wiersig — Institut für Physik, Otto-von-Guericke-Universität Magdeburg, Germany

In bimodal micropillar lasers with two orthogonally polarized modes the interaction with the common quantum-dot gain medium leads to gain competition between the two modes. This results in superthermal values of the autocorrelation function for the weak, non-lasing mode. [1] For standard nanolasers with a single cavity mode, on the other hand, a strong influence of inter-emitter correlations on the input-output characteristics as well as on the statistics of the emitted light has been described. Sub- and superradiant effects can cause an underestimation of the β-factor here and lead to the occurrence of superthermal bunching below threshold. [2]

In light of these findings we make use of a theoretical semiconductor laser model that includes correlations between the emitters in the description of bimodal microcavity lasers to investigate whether an influence of sub- and superradiant effects on the emission behavior can be observed in these systems as well.

[1] H. A. M. Leymann et al., Phys. Rev. A 87, 053819 (2013).

[2] H. A. M. Leymann et al., Phys. Rev. Appl. 4(4), 044018 (2015).