Single photon nonlinear optics in photonic crystals

نویسندگان

  • Dirk Englund
  • Ilya Fushman
  • Andrei Faraon
  • Jelena Vučković
  • Zameer U. Hasan
  • Alan E. Craig
  • Philip R. Hemmer
چکیده

We coherently probe a quantum dot that is strongly coupled to a photonic crystal nano-cavity by scattering of a resonant laser beam. The coupled system’s response is highly nonlinear as the quantum dot saturates with nearly one photon per cavity lifetime. This system enables large amplitude and phase shifts of a signal beam via a control beam, both at single photon levels. We demonstrate photon-photon interactions with short pulses in a system that is promising for ultra-low power switches and two-qubit quantum gates.

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تاریخ انتشار 2009