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Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)

Ultra-widely tunable nanofiber Bragg cavities for quantum optics

Andreas Wolfgang Schell, Hideaki Takashima, Shunya Kamioka, Yasuko Oe, Shinjiro Fujita, Masazumi Fujiwara, Oliver J. Benson, Shigeki Takeuchi

Published Aug 1, 2015• 0 citations
Publisher

Abstract

For efficient interfacing of quantum emitters nano- and microcavities are important tools. Here, we introduce Bragg cavities fabricated on nanofibers. We show strain-tuning of the cavity resonance and first coupling experiments with quantum emitters.
DOI
10.1109/cleopr.2015.7376410

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Optical cavities are of central importance in numerous areas of physics, including precision measurement, cavity optomechanics and cavity quantum electrodynamics. The miniaturisation and scaling to large numbers of sites is of interest for many of these applications, in particular for quantum computation and simulation. Here we present the first scaled microcavity system which enables the creation of large numbers of highly uniform, tunable light-matter interfaces using ions, neutral atoms or solid-state qubits. The microcavities are created by means of silicon micro-fabrication, are coupled directly to optical fibres and can be independently tuned to the chosen frequency, paving the way for arbitrarily large networks of optical microcavities.
Abstract We discuss how optical nanofibers, subwavelength-diameter fibers, can open new perspectives in quantum optical technologies theoretically and experimentally. Discussions are mainly focused on the manipulation of spontaneous emission for atoms around the nanofiber. We show that photons from single quantum emitters can be efficiently channeled into guided modes of the nanofiber. Especially by fabricating a cavity structure of the nanofiber, the channeling efficiency can be improved to exceed 80% although the cavity finesse is moderate. We discuss also how to realize such a nanofiber cavity experimentally.