Regensburg 2022 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 25: Poster 1

HL 25.90: Poster

Wednesday, September 7, 2022, 18:00–20:00, P2

Acquisition and analysis of photocurrent spectra for 850 nm oxide-confined vertical-cavity surface-emitting lasers — Arndt Jaeger¹, Marwan Bou Sanayeh², Helmut Meinert¹, •Manuel Haerer¹, Oleg Yu. Makarov², Ilya E. Titkov², Nikolay Ledentsov Jr.², and Nikolay N. Ledentsov² — ¹Esslingen 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.