Efficient routing of single photons by one atom and a microtoroidal cavity

Efficient routing of single photons by one atom and a microtoroidal cavity

Single photons from a coherent input are efficiently redirected to a separate output by way of a fiber-coupled microtoroidal cavity interacting with individual cesium atoms. By operating in an overcoupled regime for the input-output to a tapered fiber, our system functions as a quantum router with h...

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Veröffentlicht in:Physical review letters 2009-02, Vol.102 (8), p.083601-083601, Article 083601
Hauptverfasser: Aoki, Takao, Parkins, A S, Alton, D J, Regal, C A, Dayan, Barak, Ostby, E, Vahala, K J, Kimble, H J
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container_end_page 083601
container_issue 8
container_start_page 083601
container_title Physical review letters
container_volume 102
creator Aoki, Takao
Parkins, A S
Alton, D J
Regal, C A
Dayan, Barak
Ostby, E
Vahala, K J
Kimble, H J
description Single photons from a coherent input are efficiently redirected to a separate output by way of a fiber-coupled microtoroidal cavity interacting with individual cesium atoms. By operating in an overcoupled regime for the input-output to a tapered fiber, our system functions as a quantum router with high efficiency for photon sorting. Single photons are reflected and excess photons transmitted, as confirmed by observations of photon antibunching (bunching) for the reflected (transmitted) light. Our photon router is robust against large variations of atomic position and input power, with the observed photon antibunching persisting for intracavity photon number 0.03 < or approximately similar n < or approximately similar 0.7.
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title Efficient routing of single photons by one atom and a microtoroidal cavity
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