Berlin 2024 – scientific programme

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DS: Fachverband Dünne Schichten

DS 20: Poster II

DS 20.34: Poster

Thursday, March 21, 2024, 18:00–20:30, Poster D

Dielectric function of Rubi in static and lasing operation — •Noah Stiem, Younes Slimi, Clara Köhler, Stefan Krischok, and Rüdiger Schmidt-Grund — TU Ilmenau, Fachgebiet Technische Physik I, Weimarer Straße 32, 98693 Ilmenau

In a future study of the transient dielectric function of the classic laser material ruby by time-resolved spectroscopic ellipsometry (TRSE) we plan to investigate the influence of stimulated emission on the TRSE results and their analysis. Here we lay the groundwork by determining the steady-state dielectric function tensor of ruby samples via Mueller-matrix ellipsometry in reflection and transmission configuration. The data presented is not only necessary for the analysis of subsequent time-dependent measurements, but already allows insight into the changes of the dielectric function due to pump excitation. When pumping with a blue laser, the static dielectric function shows a change in intensity of the chromium states responsible for lasing at 692.80 nm and 694.25 nm caused by laser action in the material.

Keywords: Ruby, Lasing, Dielectric Function, Dynamics