Keyu Xia

Research Interests: Quantum optics, quantum information, quantum measurement and nanophotonics

Dr. Keyu Xia received his PhD in Optics from the Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences in 2007. He worked as a postdoctoral researcher and research fellow at the Max Planck Institute for Nuclear Physics (Germany), Texas A&M University (USA), and Macquarie University (Australia). His research mainly covers quantum optics, quantum information and nanophotonics.He has published more than 40 papers in top international physics journals including Science, Nature Photonics, Physical Review Letters and Physical Review X, and holds two published PCT international invention patents. His research has been repeatedly highlighted in review articles in Science and Nature, news commentary in Nature Photonics, and reports on Phys.org. His work was selected as one of the Top 10 Optical Breakthroughs in China (Fundamental Research Category, 2018).He theoretically proposed and experimentally demonstrated dielectric chiral polarization-momentum locking for constructing chiral quantum optical systems and magnet-free optical isolation at room temperature. He put forward a scheme to realize optical isolators and circulators by exploiting chiral optical Kerr nonlinearity to break dynamical reciprocity in nonlinear optics. His group experimentally achieved the generation of chiral vector vortex beams carrying orbital angular momentum on photonic chips, and established a generalized coupled-mode theory describing the generation and propagation of chiral vortex light. He proposed a practical theoretical scheme for single-photon isolation, which was later verified experimentally by the Vienna Center for Quantum Science and Technology. He also developed a theoretical framework for single-photon quantum non-demolition measurement based on chiral optical four-wave mixing.Dr. Xia was selected into the Young Overseas High-level Talents Program in 2017. He serves as a peer reviewer for more than ten international journals, such as Physical Review Letters, Physical Review A/B, Physical Review Applied, Optics Express, Journal of the Optical Society of America B, and Journal of Physics B.