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Research topics:Photonic Quantum Devices And Their Applications

Telecom band quantum light sources and their applications on quantum engineering

Developing quantum light source technologies for various correlated/entangled complicated photonic quantum states, exploring novel photonic quantum information applications based on them.


Silicon photonic quantum integration technologies

Developing novel devices for generation, manipulation and detection of photonic quantum states based on silicon photonics, realizing on-chip integration of complicated quantum information functions.


Novel materials and structures of photonic devices and their applications on quantum devices

Exploring various materials and structures which are promising candidates for novel photonic quantum devices, developing novel hybrid photonic quantum platforms.


Research highlights

  • We achieved a complete solution of telecom band quantum light sources based on fiber optics and silicon photonics, developed practical equipment based on them, and applied them on field experiments of quantum communications.
    -  True Single-Photon Stimulated Four-Wave Mixing, ACS Photonics,4(4),746-753, 2017
    -  Generation of hyper-entanglement on polarization and energy-time based on a silicon micro-ring cavity, Optics Express, 23(4), 3985, 2015
    -  Generation of hyper-entanglement in polarization/energy-time and discrete-frequency/energy-time in optical fibers, Scientific Reports, 5, 9195, 2015
    -  Entanglement swapping over 100 km optical fiber with independent entangled photon-pair sources, OPTICA,4(10), 1214-1218, 2017
    -  Quantum teleportation with independent sources and prior entanglement distribution over a network, Nature Photonics, 10(10),671-675, 2016                            

  • The first experimental demonstration of entanglement-based quantum secure direct communication (QSDC) with optical fibers was realized over a transmission distance of 500 m. This work was published in November 2017 and it is currently one of the highly cited paper in the database of Essential Science Indicators (ESI). It has been featured by renowned technical review media, such as the MIT Technology Review.
    -  Fiber based frequency-degenerate polarization entangled photon pair sources for information encoding, Optics Express, 24(22),25619-25628, 2016
    -  Experimental long-distance quantum secure direct communication, Science Bulletin, 62, 1519?1524, 2017

  • The scheme of temporal quantum ghost imaging over long-distance optical fibers was proposed and demonstrated experimentally. It was further extended to quantum secure ghost imaging (QSGI) based on the introduction of the security testing mechanism of quantum key distribution (QKD). This work was introduced as new scientific progress on quantum ghost imaging in Springer’s monograph “Quantum Metrology, Imaging, and Communication.”
    -  Long-distance temporal quantum ghost imaging over optical fibers, Scientific Reports, 6,26022, 2016
    -  Quantum secure ghost imaging, Physical Review A, 98, 063816, 2018