Erlangen 2022 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 9: Precision Measurements and Metrology II
Q 9.4: Talk
Monday, March 14, 2022, 17:30–17:45, Q-H11
High-reflective Si metamaterial coating for 1550 nm — •Mariia Matiushechkina1, Andrey Evlyukhin2, Boris Chichkov2, and Michèle Heurs1 — 1Institute for Gravitational Physics, Leibniz Universität Hannover, Callinstr. 36, 30167 Hannover, Germany — 2Institute of Quantum Optics, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, Germany
Modern quantum experiments require systems with unique mechanical and optical properties that would be able to operate at the quantum regime. One particular possible implementation is a high-reflective at the wavelength 1550 nm substrate that will be kept at cryogenic temperature for the purpose to increase sensitivity in the future gravitational wave detectors. We suggest a design of a system that exposes not only high mechanical properties but also high-reflectivity due to the metamaterial surface on the top. The metasurface is made from periodically arranged silicon nano-spheres placed on a sapphire substrate that coming into the Mie-resonance with the incident light. We theoretically and numerically investigate the functionality of such metasurface and study the influence of structural and dimensional imperfections on the optical properties.