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Phys Rev Lett. 2014 Oct 3;113(14):143601. Epub 2014 Sep 29.

Cavity quantum electrodynamics on a nanofiber using a composite photonic crystal cavity.

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Center for Photonic Innovations, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan.


We demonstrate cavity QED conditions in the Purcell regime for single quantum emitters on the surface of an optical nanofiber. The cavity is formed by combining an optical nanofiber and a nanofabricated grating to create a composite photonic crystal cavity. By using this technique, significant enhancement of the spontaneous emission rate into the nanofiber guided modes is observed for single quantum dots. Our results pave the way for enhanced on-fiber light-matter interfaces with clear applications to quantum networks.

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