• Single-photon all-optical switching using coupled microring resonators

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    • Keywords


      Microring resonator; single-photon switching.

    • Abstract


      We study the nonlinear phase response of a microring resonator coupled to a bus waveguide and the use of this nonlinear phase shift to store information in the microring resonator and enhance the switching characteristics of a Mach–Zehnder interferometer (MZI). By introducing coupling between adjacent microring resonators, the switching characteristics of the MZI can be exponentially enhanced as a function of the number of microring resonators, when compared to the linear enhancement for uncoupled resonators. With only a few moderate-finesse microring resonators, the switching power can be reduced to attowatt level, allowing for photonic switching devices that operate at single-photon level in ordinary optical waveguides.

    • Author Affiliations


      Wenge Yang1 2 Amitabh Joshi1 Min Xiao1

      1. Department of Physics, University of Arkansas, Fayetteville, AR 72701, USA
      2. School of Engineering, University of CA, Santa Cruz, 1156 High Street, Santa Cruz, CA, 95064, USA
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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