SKM 2023 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 43: Semiconductor lasers II
HL 43.6: Talk
Thursday, March 30, 2023, 16:30–16:45, JAN 0027
Multimode lasing in a microdisk nanolaser — •M. L. Drechsler1, F. Nippert2, L. Sung-Min Choi2, M. R. Wagner2, P. Boucaud3, S. Reitzenstein2, and Frank Jahnke1 — 1Institute for Theoretical Physics, University of Bremen, Bremen, Germany — 2nstitute of Solid State Physics, Technische Universität Berlin, Berlin, Germany — 3CRHEA, Université Côte d*Azur, 06560 Valbonne, France
We investigate the quantum emission properties of a GaN-based microdisk nanolasers with a diameter of 2 µ m and β-factor close to unity, pushing the device in the regime of strongly reduced laser threshold. A quantum optical semiconductor laser model based on the cluster expansion technique is used to describe the pump-power dependent emission with one consistent set of material parameters, thereby identifying laser action. Photon correlations quantified by g(1)(τ) and g(2)(τ) are an essential tool for this research. Information about the energy spectrum and the detection characteristics of photons is encoded in them. In this device we observe multimode lasing. We show that the mode coupling between well-separated resonator modes has a significant influence on the emission characteristics. Furthermore, we analyze what influence the mode couplings have on photon correlations.