Generation of hyper-entanglement on polarization and energy-time based on a silicon micro-ring cavity.

In this paper, hyper-entanglement on polarization and energy-time is generated based on a silicon micro-ring cavity. The silicon micro-ring cavity is placed in a fiber loop connected by a polarization beam splitter. Photon pairs are generated by the spontaneous four wave mixing (SFWM) in the cavity bi-directionally. The two photon states of photon pairs propagate along the two directions of the fiber loop and are superposed in the polarization beam splitter with orthogonal polarizations, leading to the polarization entanglement generation. On the other hand, the energy-time entanglement is an intrinsic property of photon pairs generated by the SFWM, which maintains in the process of the state superposition. The property of polarization entanglement is demonstrated by the two photon interferences under two non-orthogonal polarization bases. The property of energy-time entanglement is demonstrated by the Franson type interference under two non-orthogonal phase bases. The raw visibilities of all the measured interference fringes are higher than 1/2, the bench mark for violation of the Bell inequality. It indicates that silicon micro-ring cavity is a promising candidate to realize high performance hyper-entanglement generation.

[1]  Generation of 1.5 μm discrete frequency-entangled two-photon state in polarization-maintaining fibers. , 2014, Optics letters.

[2]  Sae Woo Nam,et al.  Distribution of time-energy entanglement over 100 km fiber using superconducting single-photon detectors. , 2008, Optics express.

[3]  Paul L Voss,et al.  Optical-fiber source of polarization-entangled photons in the 1550 nm telecom band. , 2004, Physical review letters.

[4]  Nathan K Langford,et al.  Generation of hyperentangled photon pairs. , 2005, Physical review letters.

[5]  J. Sipe,et al.  Spontaneous four-wave mixing in microring resonators. , 2010, Optics letters.

[6]  V. Lorenz,et al.  Polarization-entangled photon-pair generation in commercial-grade polarization-maintaining fiber , 2013, 1310.3922.

[7]  Kyo Inoue,et al.  Generation of pulsed polarization-entangled photon pairs in a 1.55-microm band with a periodically poled lithium niobate waveguide and an orthogonal polarization delay circuit. , 2005, Optics letters.

[8]  Peter Karkus,et al.  On-chip generation and demultiplexing of quantum correlated photons using a silicon-silica monolithic photonic integration platform. , 2014, Optics express.

[9]  M. Sorel,et al.  Emission of time-energy entangled photon pairs from an integrated silicon ring resonator , 2014, 2014 Conference on Lasers and Electro-Optics (CLEO) - Laser Science to Photonic Applications.

[10]  Wei Zhang,et al.  Energy-time entanglement generation in optical fibers under CW pumping. , 2014, Optics express.

[11]  N. Harris,et al.  Integrated Source of Spectrally Filtered Correlated Photons for Large-Scale Quantum Photonic Systems , 2014, 1409.8215.

[12]  Akio Yoshizawa,et al.  Generation of polarisation-entangled photon pairs at 1550 nm using two PPLN waveguides , 2003 .

[13]  H. Takesue,et al.  Frequency and Polarization Characteristics of Correlated Photon-Pair Generation Using a Silicon Wire Waveguide , 2010, IEEE Journal of Selected Topics in Quantum Electronics.

[14]  1.5 μm polarization entanglement generation based on birefringence in silicon wire waveguides. , 2013, Optics letters.

[15]  Hyperentanglement: Breaking the communication barrier , 2008 .

[16]  Jiangde Peng,et al.  Polarization-entangled Bell states generation based on birefringence in high nonlinear microstructure fiber at 1.5 microm. , 2009, Optics letters.

[17]  Paul G. Kwiat,et al.  Hyper-entangled states , 1997 .

[18]  Hiroshi Fukuda,et al.  Generation of polarization entangled photon pairs using silicon wire waveguide. , 2008, Optics express.

[19]  Wei Zhang,et al.  The impact of nonlinear losses in the silicon micro-ring cavities on CW pumping correlated photon pair generation. , 2014, Optics express.

[20]  Kyo Inoue,et al.  Generation of polarization-entangled photon pairs and violation of Bell's inequality using spontaneous four-wave mixing in a fiber loop , 2004 .

[21]  N. Gisin,et al.  Pulsed Energy-Time Entangled Twin-Photon Source for Quantum Communication , 1999 .