Photon Phase Shift at the Few-Photon Level and Optical Switching by a Quantum Dot in a Microcavity

  title={Photon Phase Shift at the Few-Photon Level and Optical Switching by a Quantum Dot in a Microcavity},
  author={L. M. Wells and S. Kalliakos and B. Villa and D. Ellis and R. Stevenson and A. Bennett and I. Farrer and D. Ritchie and A. Shields},
  journal={arXiv: Quantum Physics},
  • L. M. Wells, S. Kalliakos, +6 authors A. Shields
  • Published 2019
  • Physics, Mathematics
  • arXiv: Quantum Physics
  • We exploit the nonlinearity arising from the spin-photon interaction in an InAs quantum dot to demonstrate phase shifts of scattered light pulses at the single-photon level. Photon phase shifts of close to 90◦ are achieved using a charged quantum dot in a micropillar cavity. We also demonstrate a photon phase switch by using a spin-pumping mechanism through Raman transitions in an in-plane magnetic field. The experimental findings are supported by a theoretical model that explores the dynamics… CONTINUE READING

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