Dresden 2020 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 1: Tutorial: Frontiers of Semiconductor Lasers (joint session HL/TUT)

HL 1.4: Tutorium

Sonntag, 15. März 2020, 18:00–18:40, HSZ 403

Lasers for emulating topological and spin systems — •Mercedeh Khajavikhan — University of Southern California, Los Angeles, United States of America

In recent years, there has been a growing interest in using micro- and nano-scale lasers for implementing topological and spin systems. Spin models arise in the microscopic description of magnetic materials, where the macroscopic characteristics are governed by exchange interactions among the constituent magnetic moments. On the other hand, topological features are characterized as properties that remain invariant during continuous deformations of the system. The additional degrees of freedom afforded by gain and loss in active elements provide excellent opportunities to emulate these systems in a versatile photonic platform. In this tutorial, we describe some of the activities by our group and others in utilizing nanolasers and microcavities for implementing topological and spin systems. These studies could pave the way towards a new scalable nanophotonic platform to study spin exchange interactions or topological insulators, that can in turn be potentially exploited to design high power laser arrays, investigate more large-scale networks, emulate some magnetic materials, or to address a variety of optimization problems.