Regensburg 2022 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 4: Semiconductor Lasers
HL 4.7: Vortrag
Montag, 5. September 2022, 11:30–11:45, H33
Investigations on high-β silver-coated InP-based metallic nanolasers and their spectral line shape behavior — •Monty Leon Drechsler1, J. Buchgeister1, A. Koulas-Simos2, K. Laiho2, G. Sinatkas2, T. Zhang3, J. Xu3, F. Lohof1, F. Jahnke1, C. Gies1, W. W. Chow4, C.-Z. Ning3, and S. Reitzenstein2 — 1University of Bremen, Bremen, Germany — 2Technical University of Berlin, Berlin, Germany — 3Tsinghua University, 1303 Beijing 100084, China — 4Sandia National Laboratories, Albuquerque, New Mexico, USA
We investigate a silver-coated InP-based metallic nanolasers with a diameter of several 100 nm and β-factor close to unity, pushing the device in the regime of quantum optics. We use a quantum optical semiconductor laser model utilizing an equation of motion approach together with the cluster expansion technique to analyze the device. 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 study, an unconventional behavior of the spectral line shape was found. We observe that the line shape takes a Gaussian profile above the laser threshold. The exciting question arises whether the Gaussian line shape can be used as an indicator of laser activity. In previous works, a similar behavior has been reported, but no explanation was given. We provide an explanation for this behavior of the line shape in the framework of an open-cavity multimode model.