Regensburg 2022 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 25: Poster 1

HL 25.90: Poster

Mittwoch, 7. September 2022, 18:00–20:00, P2

Acquisition and analysis of photocurrent spectra for 850 nm oxide-confined vertical-cavity surface-emitting lasersArndt Jaeger1, Marwan Bou Sanayeh2, Helmut Meinert1, •Manuel Haerer1, Oleg Yu. Makarov2, Ilya E. Titkov2, Nikolay Ledentsov Jr.2, and Nikolay N. Ledentsov21Esslingen University of Applied Sciences, Flandernstrasse 101, 73732 Esslingen, Germany — 2VI Systems GmbH, Hardenbergstrasse 7, 10623 Berlin, Germany

Vertical-cavity surface-emitting lasers (VCSELs) are of utmost importance as key components for high-speed datacom, sensor and free-space applications. Therefore, for a successful further optimization of their performance, understanding their aging behavior is of crucial importance. The 850 nm oxide-confined VCSELs used in this study were intentionally operated at extreme conditions to accelerate their degradation until reaching optical damage. For monitoring operation-induced changes, a photocurrent spectroscopy (PCS) setup was established and applied before and after accelerated aging. The PCS results at different reverse biases reveal changes that can be explained by non-radiative recombination centers generated during accelerated aging. This finding contributes to the understanding of the aging mechanisms in these tiny devices.

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