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Interaction of light with matter: photoacoustic laser streaming and optical properties of low-dimensional Perovskites

Date: 2018-07-12
Time: 10:00
Venue: 物理研究所M楼253会议室
Speaker: Prof. Jiming Bao

I will show you two recent works from my lab. I will first demonstrate the generation of a liquid jet by simply focusing a pulsed laser into water through a glass window.  This is a new optofluidics principle that combines photoacoustics with acoustic streaming. Due to small momentum of photons and many other reasons, the transportation or manipulation of matter with lasers has been a great challenge. The key to our laser streaming is a special photoacoustic transducer that can convert a single laser pulse to a multi-cycle ultrasound oscillation, a train of laser pulses can then generate a quasi-continuous ultrasound wave which produces a steady flow as in classical acoustic streaming. In the second part, I will talk about some important but controversial issues in low dimensional Perovskites. Specifically, I will discuss about edge states in Ruddlesden-Popper organic-inorganic perovskites, controversial bandgaps of two-dimensional CsPb2Br5 and zero-dimensional Cs4PbBr6. I will share with you our preliminary results and understandings of these materials.

Dr. Bao is an associate professor of Electrical and Computer engineering at the University of Houston. He graduated from Zhejiang University with B.S. and M.S. in physics in 1992 and 1995, respectively. He obtained his Ph.D. in applied physics in 2003 from the University of Michigan, he then did post-doctoral research at Harvard University before joining the University of Houston in 2008 as an assistant professor. His current research covers many interdisciplinary topics ranging from solar energy conversion to fiber optic sensing. More information can be found from Dr. Bao’s group website at

邀请人:  赵继民  研究员(电话:82649503)
联系人:  朱学涛  副研究员(电话:82649008)