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Q: Fachverband Quantenoptik und Photonik

Q 2: Nano-Optics and Optomechanics

Q 2.6: Poster

Montag, 20. September 2021, 16:30–18:30, P

Nanofiber-induced losses inside an optical cavity — •Sebastian Slama, Bernd Welker, and Thorsten Österle — Center for Quantum Science and Physikalisches Institut, Universität Tübingen, Germany

Optical cavities are well-known to enhance light-matter interactions, and are an established tool in the context of cold atoms. In contrast, putting single solid emitters into cavity modes remains a challenge, mainly due to the fact that the typically plane substrates, where the emitters are embedded, lead to a substantial optical loss in the cavity. We follow the idea to use nanofibers with sub-wavelength diameter as possible substrates with low loss. We have experimentally measured the nanofiber-induced loss inside an optical cavity with a finesse of F=1250 as function of nanofiber position for various nanofiber diameters. Only little reduction of the finesse is observed for a fiber diameter of 150 nm. The observations are consistent with the optical loss induced by Mie scattering theory.