Non-Hermitian Nonlinear Optics in Atomic Systems

Non-Hermitian Nonlinear Optics in Atomic Systems
Date & Time: 
Wednesday, October 14, 2020 - 14:00 to 15:00
Chao Hang, East China Normal University
Room 264, Geography Building, Zhongbei Campus, East China Normal University


In this talk, I shall report the theoretical and experimental research progresses of the superradiance of high-lying Rydberg states of caesium atoms, enhanced by room-temperature BBR photons in free space. We show that, due to high numbers of MW photons per mode in the BBR field, decay of single Rydberg atoms is orders of magnitude faster than in vacuum, which significantly increases strength of the Rydberg superradiance. Our study provides insights into the many body dynamics of interacting atoms coupled to thermal BBR, and might open a route to the design of blackbody thermometry at microwave frequencies via photon-atom interactions.


Chao Hang received his Ph.D. degree in 2007 from Department of Physics at East China Normal University.  His research areas are nonlinear physics and optics.  Dr. Hang is currently a researcher and doctoral supervisor at the State Key Laboratory of Precision Spectroscopy at East China Normal University.  His current research is mainly focused on nonlinear and quantum optical effects in light-atom interaction system, and have achieved a number of results. Dr. Hang has published more than 50 papers in renowned journals including Phys. Rev. Lett. and Adv. Phys. X, and has presided over 3 NSFC projects.

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Seminar by the NYU-ECNU Institute of Physics at NYU Shanghai