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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 25 — Dec. 3, 2012
  • pp: 27510–27519

Downconversion quantum interface for a single quantum dot spin and 1550-nm single-photon channel

Jason S. Pelc, Leo Yu, Kristiaan De Greve, Peter L. McMahon, Chandra M. Natarajan, Vahid Esfandyarpour, Sebastian Maier, Christian Schneider, Martin Kamp, Sven Höfling, Robert H. Hadfield, Alfred Forchel, Yoshihisa Yamamoto, and M. M. Fejer  »View Author Affiliations

Optics Express, Vol. 20, Issue 25, pp. 27510-27519 (2012)

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Long-distance quantum communication networks require appropriate interfaces between matter qubit-based nodes and low-loss photonic quantum channels. We implement a downconversion quantum interface, where the single photons emitted from a semiconductor quantum dot at 910 nm are downconverted to 1560 nm using a fiber-coupled periodically poled lithium niobate waveguide and a 2.2-μm pulsed pump laser. The single-photon character of the quantum dot emission is preserved during the downconversion process: we measure a cross-correlation g(2)(τ = 0) = 0.17 using resonant excitation of the quantum dot. We show that the downconversion interface is fully compatible with coherent optical control of the quantum dot electron spin through the observation of Rabi oscillations in the downconverted photon counts. These results represent a critical step towards a long-distance hybrid quantum network in which subsystems operating at different wavelengths are connected through quantum frequency conversion devices and 1.5-μm quantum channels.

© 2012 OSA

OCIS Codes
(190.4390) Nonlinear optics : Nonlinear optics, integrated optics
(270.5565) Quantum optics : Quantum communications
(230.7405) Optical devices : Wavelength conversion devices
(250.5590) Optoelectronics : Quantum-well, -wire and -dot devices

ToC Category:
Quantum Optics

Original Manuscript: September 27, 2012
Revised Manuscript: November 9, 2012
Manuscript Accepted: November 13, 2012
Published: November 27, 2012

Jason S. Pelc, Leo Yu, Kristiaan De Greve, Peter L. McMahon, Chandra M. Natarajan, Vahid Esfandyarpour, Sebastian Maier, Christian Schneider, Martin Kamp, Sven Höfling, Robert H. Hadfield, Alfred Forchel, Yoshihisa Yamamoto, and M. M. Fejer, "Downconversion quantum interface for a single quantum dot spin and 1550-nm single-photon channel," Opt. Express 20, 27510-27519 (2012)

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