SAMOP 2021 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 11: Quantum Information (joint session QI/Q)
Q 11.22: Poster
Mittwoch, 22. September 2021, 16:30–18:30, P
Ultra-stable open micro-cavity platform for closed cycle cryostats — •Michael Förg1,2, Jonathan Noé1,2, Manuel Nutz1,2, Theodor Hänsch2, and Thomas Hümmer1,2 — 1Qlibri project, Faculty of Physics, Ludwig-Maximilians-Universität Munich, Germany — 2Faculty of Physics, Ludwig-Maximilians-Universität Munich, Germany
We present a fully 3D-scannable, yet highly stable micro-cavity setup, which features a stability on the sub-pm scale under ambient conditions and unprecedented stability inside closed-cycle cryostats. An optimized mechanical geometry, custom built stiff micro-positioning, vibration isolation and fast active locking enables quantum optics experiments even in the strongly vibrating environment of closed-cycle cryostats. High-finesse, open-access, mechanical tunable, optical micro-cavities offer a compelling system to enhance light matter interaction. Combining a scannable microscopic fiber-based mirror and a macroscopic planar mirror creates a versatile experimental platform. A variety of solid-state quantum systems can be brought onto the planar mirror, addressed individually, and (strongly) coupled to the cavity. With mechanical tuning of the cavity length, the resonance frequency can be adapted to the quantum system. However, the flexibility of the mechanical degrees of freedom bears also downsides. Inside close-cycle cryostats, fluctuations of the cavity length on the picometer scale are often enough to prevent the use of high-finesse cavities for quantum optics experiments. Our system enables the use of a flexible micro-cavity system for quantum applications even in this adversarial environment.