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Macroscopic rotation of photon polarization induced by a single spin

Author

Listed:
  • Christophe Arnold

    (Laboratoire de Photonique et de Nanostructures, CNRS UPR 20)

  • Justin Demory

    (Laboratoire de Photonique et de Nanostructures, CNRS UPR 20)

  • Vivien Loo

    (Laboratoire de Photonique et de Nanostructures, CNRS UPR 20)

  • Aristide Lemaître

    (Laboratoire de Photonique et de Nanostructures, CNRS UPR 20)

  • Isabelle Sagnes

    (Laboratoire de Photonique et de Nanostructures, CNRS UPR 20)

  • Mikhaïl Glazov

    (Ioffe Physical-Technical Institute of the RAS)

  • Olivier Krebs

    (Laboratoire de Photonique et de Nanostructures, CNRS UPR 20)

  • Paul Voisin

    (Laboratoire de Photonique et de Nanostructures, CNRS UPR 20)

  • Pascale Senellart

    (Laboratoire de Photonique et de Nanostructures, CNRS UPR 20
    Ecole Polytechnique)

  • Loïc Lanco

    (Laboratoire de Photonique et de Nanostructures, CNRS UPR 20
    Université Paris Diderot—Paris 7)

Abstract

Entangling a single spin to the polarization of a single incoming photon, generated by an external source, would open new paradigms in quantum optics such as delayed-photon entanglement, deterministic logic gates or fault-tolerant quantum computing. These perspectives rely on the possibility that a single spin induces a macroscopic rotation of a photon polarization. Such polarization rotations induced by single spins were recently observed, yet limited to a few 10−3 degrees due to poor spin–photon coupling. Here we report the enhancement by three orders of magnitude of the spin–photon interaction, using a cavity quantum electrodynamics device. A single hole spin in a semiconductor quantum dot is deterministically coupled to a micropillar cavity. The cavity-enhanced coupling between the incoming photons and the solid-state spin results in a polarization rotation by ±6° when the spin is optically initialized in the up or down state. These results open the way towards a spin-based quantum network.

Suggested Citation

  • Christophe Arnold & Justin Demory & Vivien Loo & Aristide Lemaître & Isabelle Sagnes & Mikhaïl Glazov & Olivier Krebs & Paul Voisin & Pascale Senellart & Loïc Lanco, 2015. "Macroscopic rotation of photon polarization induced by a single spin," Nature Communications, Nature, vol. 6(1), pages 1-6, May.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms7236
    DOI: 10.1038/ncomms7236
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    Cited by:

    1. E. Mehdi & M. Gundín & C. Millet & N. Somaschi & A. Lemaître & I. Sagnes & L. Gratiet & D. A. Fioretto & N. Belabas & O. Krebs & P. Senellart & L. Lanco, 2024. "Giant optical polarisation rotations induced by a single quantum dot spin," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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