Biograph:  He received his Bachelor’s degree from Electronic Engineering Department, Tsinghua University, China in 1998 and received his Doctor’s degree on physical electronics from Institute of Information Optoelectronics, Electronic Engineering Department, Tsinghua University, China in 2003. Then, he joined Institute of Information Optoelectronics, Electronic Engineering Department, Tsinghua University. At present, he is the tenured associate professor and the vice director of the Institute of Information Optoelectronics, Electronic Engineering Department, Tsinghua University. He is also a investigator in Frontier Science Center for Quantum Information, China, and Beijing Academy of Quantum Information Sciences. His research interest is micro/nano photonic quantum devices and their applications. He have published over 100 journal and international conference papers as the first author and corresponding author. He also hold 7 Chinese patents as the first patentee. He is the member of COS and OSA.

Title:Photonic energy-time entanglement in quantum communications

Abstract: This talk introduces our recent works on how to use photonic energy-time entanglement in quantum communications. On one hand, we realized entanglement based dispersive optics quantum key distribution over optical fibers of 20 kilometers, in which time encoding based on energy-time entanglement was used. On the other hand, we proposed and demonstrated a scheme of temporal quantum ghost imaging, which could be realized by correlations in either frequency or time in energy-time entangled photon pairs. Based on it, a scheme of quantum secure ghost imaging was proposed and demonstrated, and it was applied on a new protocol of multi-bit QDS recently.