Single Photon

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Philippe Grangier - One of the best experts on this subject based on the ideXlab platform.

  • the first Single Photon sources and Single Photon interference experiments
    2019
    Co-Authors: Alain Aspect, Philippe Grangier
    Abstract:

    This chapter shows how the concept of Single-Photon sources has emerged, in the mid 1980s. We emphasize the difference between “Single-Photon wave-packets” and attenuated classical light pulses or light beams. The quantum behavior of Single Photons—they cannot yield more than one photodetection—is contrasted with the behavior of attenuated classical light, which always yields some possibility of a joint detection on both sides of a beam splitter. We describe the Single-Photon source that we developed in the mid 1980s at Institut d’Optique, as well as the quantitative criterion (“anticorrelation”) that we introduced to show that it was indeed a Single-Photon source. We contrast these results with the ones that we obtained with a source of classical light pulses produced by a strongly attenuated light emitting diode, in which the average number of Photons per pulse was much less than 1. We also describe the interference experiment we carried out with our Single-Photon source, illustrating the notion of wave-particle duality. We conclude with a brief overview of further developments in sources of Single-Photons, heralded or on-demand, as well as in wave-particle duality experiments, in particular Wheeler’s delayed choice experiments.

  • Single Photon quantum cryptography
    Physical Review Letters, 2002
    Co-Authors: Alexios Beveratos, Rosa Brouri, Jean Philippe Poizat, Andre Villing, Thierry Gacoin, Philippe Grangier
    Abstract:

    We report the full implementation of a quantum cryptography protocol using a stream of Single Photon pulses generated by a stable and efficient source operating at room temperature. The Single Photon pulses are emitted on demand by a Single nitrogen-vacancy color center in a diamond nanocrystal. The quantum bit error rate is less that $4.6%$ and the secure bit rate is $7700\text{ }\mathrm{\text{bits}}/\mathrm{s}$. The overall performances of our system reaches a domain where Single Photons have a measurable advantage over an equivalent system based on attenuated light pulses.

  • Single Photon quantum cryptography.
    Physical review letters, 2002
    Co-Authors: Alexios Beveratos, Rosa Brouri, Jean Philippe Poizat, Andre Villing, Thierry Gacoin, Philippe Grangier
    Abstract:

    We report the full implementation of a quantum cryptography protocol using a stream of Single Photon pulses generated by a stable and efficient source operating at room temperature. The Single Photon pulses are emitted on demand by a Single nitrogen-vacancy color center in a diamond nanocrystal. The quantum bit error rate is less that 4.6% and the secure bit rate is 7700 bits/s. The overall performances of our system reaches a domain where Single Photons have a measurable advantage over an equivalent system based on attenuated light pulses.

  • a box for a Single Photon
    Nature, 1999
    Co-Authors: Philippe Grangier
    Abstract:

    A Single Photon is an elusive object, and it used to be impossible to detect Photons without destroying them. A quantum non-demolition experiment now shows how to store a Single Photon, and more importantly how to watch it repeatedly.

Robert Henry Hadfield - One of the best experts on this subject based on the ideXlab platform.

Richard P. Mirin - One of the best experts on this subject based on the ideXlab platform.

Jung-tsung Shen - One of the best experts on this subject based on the ideXlab platform.

Milos Toth - One of the best experts on this subject based on the ideXlab platform.

  • solid state Single Photon emitters
    Nature Photonics, 2016
    Co-Authors: Igor Aharonovich, Dirk Englund, Milos Toth
    Abstract:

    This Review summarizes recent progress of Single-Photon emitters based on defects in solids and highlights new research directions. The photophysical properties of Single-Photon emitters and efforts towards scalable system integration are also discussed.

  • Solid-state Single-Photon emitters
    Nature Photonics, 2016
    Co-Authors: Igor Aharonovich, Dirk Englund, Milos Toth
    Abstract:

    Single-Photon emitters play an important role in many leading quantum technologies. There is still no ‘ideal’ on-demand Single- Photon emitter, but a plethora of promising material systems have been developed, and several have transitioned from proof-of- concept to engineering efforts with steadily improving performance. Here, we review recent progress in the race towards true Single-Photon emitters required for a range of quantum information processing applications. We focus on solid-state systems including quantum dots, defects in solids, two-dimensional hosts and carbon nanotubes, as these are well positioned to benefit from recent breakthroughs in nanofabrication and materials growth techniques. We consider the main challenges and key advan- tages of each platform, with a focus on scalable on-chip integration and fabrication of identical sources on Photonic circuits.