Berlin 2024 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 37: Poster IV
HL 37.11: Poster
Wednesday, March 20, 2024, 18:00–20:30, Poster F
Exploring locking techniques for sub-picometer-scale stabilization of open micro-cavities — •Ayesha Khan1,2, Jonathan Noé1,2, Michael Förg1,2, Manuel Nutz1,2, Sambit Mitra1,2, and Thomas Hümmer1,2,3 — 1Fakultät für Physik, Ludwig-Maximilians-Universität München, Germany — 2Qlibri GmbH, München, Germany — 3Max-Planck-Institut für Quantenoptik, Garching, Germany
Fiber-based, open-access micro-cavities are a new technology allowing enhancement of light-matter interactions with stability at pico-meter scale. These cavities can be used for spectroscopy of nano-scale solid state systems, single photon sources, and quantum applications such as quantum computation and quantum repeaters. Reaching ultimate stability and performing controlled sweeps is only possible by implementation of active locking techniques which are needed alongside any measurement being performed. Here, we present two different side-of-fringe locking techniques: two stop band lock and higher order mode lock. These locking techniques allow complete decoupling of the locking laser and the excitation laser. The independent excitation laser then ensures that any noise induced by active locking is not translated into the measurements. These locking techniques can be implemented in measurements of solid-sate nano-systems such as quantum dots embedded in membranes to achieve Purcell enhancement for quantum technologies and high precision spectroscopy.
Keywords: Open micro-cavity; Cavity Stabilization; Quantum Dots; Purcell Enhancement; Locking Techniques