Regensburg 2025 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
O: Fachverband Oberflächenphysik
O 48: Poster Surface Dynamics
O 48.2: Poster
Tuesday, March 18, 2025, 18:00–20:00, P2
Design and Characterization of Optical Cavities for Light-Induced Phase Transitions in Indium-Based Peierls Insulators — •Florian Spickmann1,2, Sierra Randall Heinrich1,2, Sebastian Zafra Koch1,2, Murat Sivis1,2, Hannes Boeckmann-Clemens1,2, and Claus Ropers1,2 — 1Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany — 24th Physical Institute, University of Göttingen, Germany
The integration of quantum materials into optical cavities enables active control of their properties through enhanced light-matter interactions. Low-dimensional materials, such as Peierls insulators, are particularly sensitive to external stimuli, making them ideal candidates for such studies [1]. This work focuses on designing and fabricating optical resonators on (111) silicon membranes, including slab waveguides, ridge waveguides, and ring resonators. The structures are created using focused ion beam (FIB) milling and electron beam lithography (e-beam), with light coupling achieved via integrated gratings. Characterization of the resonators is performed using Fabry-Pérot interferometry. Future studies will employ ultrafast low-energy electron diffraction (ULEED) to visualize light-driven phase changes in indium wires localized on these optical resonators, representing a promising model system for cavity-controlled light-matter interaction in condensed matter.
[1] Böckmann, Hannes, et al., Structural Dynamics 9.4 (2022)
Keywords: Peierls insulator; Light matter interaction; Optical cavities; Ultrafast low energy diffraction