Fiber ring resonator with nanofiber section for chiral cavity quantum electrodynamics and multimode strong coupling

Abstract

We experimentally realize an optical fiber ring resonator that includes a tapered section with subwavelength-diameter waist. In this section, the guided light exhibits a significant evanescent field which allows for efficient interfacing with optical emitters. A commercial tunable fiber beam splitter provides simple and robust coupling to the resonator. Key parameters of the resonator such as its out-coupling rate, free spectral range, and birefringence can be adjusted. Thanks to the low taper- and coupling-losses, the resonator exhibits an unloaded finesse of F=75+/-1, sufficient for reaching the regime of strong coupling for emitters placed in the evanescent field. The system is ideally suited for trapping ensembles of laser-cooled atoms along the nanofiber section. Based on measured parameters, we estimate that the system can serve as a platform for optical multimode strong coupling experiments. Finally, we discuss the possibilities of using the resonator for applications based on chiral quantum optics.

References in corpus (5)

• The Quantum Internet
• Chiral nanophotonic waveguide interface based on spin-orbit coupling of light
• All-Optical Routing of Single Photons by a One-Atom Switch Controlled by a Single Photon
• Cavity QED on a nanofiber using a composite photonic crystal cavity
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Cited by in corpus (9)

• Chiral Quantum Optics
• Cavity dark mode of distant coupled atom-cavity systems
• Ultra-low-loss nanofiber Fabry-Pérot cavities optimized for cavity quantum electrodynamics
• Chiral Interaction Induced Near-Perfect Photon Blockade
• Light-matter interaction at the transition between cavity and waveguide QED
• Chirality-induced one-way quantum steering between two waveguide-mediated ferrimagnetic microspheres
• State-Insensitive Trapping of Alkaline-Earth Atoms in a Nanofiber-Based Optical Dipole Trap
• One-sided composite cavity on an optical nanofiber for cavity QED
• Feedback-cooling the fundamental torsional mechanical mode of a tapered optical fiber to 30 mK