Dresden 2026 – wissenschaftliches Programm
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FM: Fachverband Funktionsmaterialien
FM 11: Poster Session Functional Materials
FM 11.33: Poster
Dienstag, 10. März 2026, 18:00–20:30, P4
Characterization and Fabrication of Silicon Wave Guides for the Study of Quantum Material Properties — •Sierra Randall Heinrich1,2, Sebastian Zafra Koch1,2, Florian Spickmann1,2, Murat Sivis1,2, Claus Ropers1,2, and Hannes Böckmann1,2 — 1Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany — 2University of Göttingen, 4th Physical Institute, Göttingen, Germany
Placing quantum materials into optical cavities promises active control of material properties and functionality. Low-dimensional systems are particularly susceptible and exhibit electronic phases that can be switched by an external stimulus. However, the required extreme light-matter coupling is hampered by intrinsic cavity losses and poor overlap with optical modes. Here, we work towards the integration of a prototypic Peierls insulator at the surface of a silicon waveguide resonator. This project focuses on the creation of the resonator. A resonator couples the light into the sample by always totally internally reflecting it, thus generating the evanescent fields used in light matter coupling. To couple the light into the wafer, the angle of reflection has to be controllable. Here, we used diffraction gratings etched onto the surface with varying periods to achieve this. Next, we used Fabry-Pérot interference to maximize the effect of the evanescent fields. As a result, the resonance conditions of a 25 micrometer thick wafer were observed and accurately predicted for the first four resonance peaks. The two aspects of this project will be combined in future, with etched diffraction gratings on a thin wafer.
Keywords: Optical Cavity; Silicon Wafer; Diffraction Gratings; Infrared Laser; Fabry-Perot Interference