Publication:
Tunable single-photon quantum router

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2019-03-14
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American physical society
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We propose an efficient single-photon router comprising two resonator waveguide channels coupled by several sequential cavities with embedded three-level atoms. We show that the system can operate as a perfect four-way single-photon switch. We also demonstrate that an incident single photon propagating in one of the waveguides can be routed into one or the other output channels; such routing can be controlled by the external classical electromagnetic field driving the atoms. We argue that, under appropriate conditions, the efficiency of such routing can be close to 100% within a broad operational bandwidth, suggesting various applications in photonics.
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Work in Madrid was supported by MINECO (Grant No. MAT2016-75955). M.A. acknowledges financial support from a PIIC-UTFSM grant, DGIIP UTFSM, and CONICYT Doctorado Nacional through Grant No. 21141185.
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