SKM 2021 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 22: Focus Session: Emerging Semiconductor Laser Concepts

HL 22.1: Invited Talk

Friday, October 1, 2021, 10:00–10:30, H4

Two-dimensional gain materials for new nanolaser concepts — •Christopher Gies — Institut für Theoretische Physik, Universität Bremen

The talk will give an overview of the many-facetted physics of nanolasers. A particular focus will be on the gain properties when using TMD (transition metal dichalcogenide) monolayers and heterostuctures inside optical microresonators to design a new class of nanolasers [C. Gies and A. Steinhoff, Laser&Photonics Review 2021, 2000482]. Operating close to the ideal limit, high-β lasers require extra effort in unambiguously identifying laser operation. For this, quantum-optical studies have become the state of the art. Atomically thin TMD semiconductors hold much promise for optoelectronics, but have yet to demonstrate their application potential in new technologies. We will discuss possible gain mechanisms in TMD based nanolasers and identify signatures of lasing operation in these devices. For this, the interplay of excitonic effects caused by strong Coulomb interaction, and plasma effects in the high-excitation-density regime, need to be taken into consideration.