Frequency conversion in silicon in the single photon regime.

Quantum communication networks require single photon frequency converters, whether to shift photons between wavelength channels, to shift photons to the operating wavelength of a quantum memory, or to shift photons of different wavelengths to be of the same wavelength, to enable a quantum interference. Here, we demonstrate frequency conversion of laser pulses attenuated to the single photon regime in an integrated silicon-on-insulator device using four-wave mixing Bragg scattering, with conversion efficiencies of up to 12%, or 32% after correcting for nonlinear loss created by the pump lasers. The frequency shift can be conveniently chosen by tuning of the pump frequencies. We demonstrate that such frequency conversion enables interference between photons at different frequencies.

[1]  C. McKinstrie,et al.  Theory of quantum frequency translation of light in optical fiber: application to interference of two photons of different color. , 2011, Optics express.

[2]  T. Ralph,et al.  Demonstration of an all-optical quantum controlled-NOT gate , 2003, Nature.

[3]  Hong,et al.  Measurement of subpicosecond time intervals between two photons by interference. , 1987, Physical review letters.

[4]  Imad Agha,et al.  Low-noise chip-based frequency conversion by four-wave-mixing Bragg scattering in SiN(x) waveguides. , 2012, Optics letters.

[5]  A. Gnauck,et al.  Demonstration of low-noise frequency conversion by bragg scattering in a fiber. , 2006, Optics express.

[6]  H. Weinfurter,et al.  Experimental quantum teleportation , 1997, Nature.

[7]  T. Krauss,et al.  Slow-light enhanced correlated photon pair generation in a silicon photonic crystal waveguide. , 2011, Optics letters.

[8]  Imad Agha,et al.  Low-noise on-chip frequency conversion by four-wave-mixing Bragg scattering in SiNx waveguides , 2012 .

[9]  S. J. van Enk,et al.  Interference of two photons of different color , 2010, 1002.0350.

[10]  K. Srinivasan,et al.  A chip-scale, telecommunications-band frequency conversion interface for quantum emitters. , 2013, Optics Express.

[11]  Hiroki Takesue,et al.  Erasing distinguishability using quantum frequency up-conversion. , 2008, Physical review letters.

[12]  A. Gaeta,et al.  Frequency translation via four-wave mixing Bragg scattering in Rb filled photonic band-gap fibers , 2014, 2014 Conference on Lasers and Electro-Optics (CLEO) - Laser Science to Photonic Applications.

[13]  M. Fejer,et al.  Highly efficient single-photon detection at communication wavelengths by use of upconversion in reverse-proton-exchanged periodically poled LiNbO3 waveguides. , 2005, Optics letters.

[14]  C J McKinstrie,et al.  Quantum frequency translation of single-photon states in a photonic crystal fiber. , 2010, Physical review letters.

[15]  Hiroshi Fukuda,et al.  Generation of high-purity entangled photon pairs using silicon wire waveguide. , 2008, Optics express.

[16]  B. Eggleton,et al.  Optimizing optical Bragg scattering for single-photon frequency conversion , 2014, 1412.3511.

[17]  J. Sipe,et al.  Stimulated emission tomography. , 2013, Physical review letters.

[18]  Dirk Englund,et al.  Unconditional security of time-energy entanglement quantum key distribution using dual-basis interferometry. , 2013, Physical review letters.

[19]  Benjamin J Eggleton,et al.  High-efficiency frequency conversion in the single-photon regime. , 2013, Optics letters.

[20]  Thomas F. Krauss,et al.  Multi-photon absorption limits to heralded single photon sources , 2013, Scientific Reports.

[21]  Michal Lipson,et al.  Low loss etchless silicon photonic waveguides , 2009 .

[22]  Nicolas Gisin,et al.  Quantum repeaters based on atomic ensembles and linear optics , 2009, 0906.2699.

[23]  Kumar,et al.  Observation of quantum frequency conversion. , 1992, Physical review letters.

[24]  H. J. Kimble,et al.  The quantum internet , 2008, Nature.

[25]  Brian J. Smith,et al.  Large-alphabet time-frequency entangled quantum key distribution by means of time-to-frequency conversion. , 2013, Optics express.