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HL: Fachverband Halbleiterphysik

HL 64: Poster II

HL 64.12: Poster

Donnerstag, 19. März 2020, 10:00–13:00, P1A

Simulation of Mode Competition Phenomena in Nitride Laser Diodes — •Eduard Kuhn, Lukas Uhlig, Matthias Wachs, Ulrich T. Schwarz, and Angela Thränhardt — Institut für Physik, Technische Universität Chemnitz

Due to their small separation of longitudinal modes, Fabry-Pérot type laser diodes show rich mode competition effects. For example streak camera measurements show cyclic mode hopping, where the currently active longitudinal mode changes from lower to higher wavelengths. This effect can be explained by beating vibrations of the carrier densities in the quantum wells. In this work we simulate the mode dynamics using a model based on the semiconductor Bloch equations and compare the results with streak camera measurements. We also discuss the influence of the cavity length on the mode dynamics and how different scattering terms affect the interaction between longitudinal modes.