ABSTRACT
To understand and ultimately control the properties of most functional materials, from molecular soft-matter to quantum materials, requires access to the structure, coupling, and dynamics on the elementary time and length scales that define the microscopic interactions in these materials. Ultrafast spectroscopy is a great tool to gain access to these goals. Through the study of ultrafast carrier dynamics and coherent phonon dynamics, we can understand the physics under nonequilibrium. In this talk, I will first introduce our pump-probe technique, and applications of carrier dynamics in semiconductors in revealing the hidden phases. Then, I will introduce the coherent phonons dynamics and its uniqueness in extracting electron-phonon coupling constant and some recent work on black phosphorous.
BIOGRAPHY
Prof. Feng He is an Assistant Professor in Harbin Institute of Technology (Shenzhen). She got her Ph.D. in Materials Engineering, University of Texas at Austin (2018). She was awarded the Brookhaven National Laboratory (BNL) scholarship and was selected as the Rising Star of MIT School of Mechanical Engineering in 2018. Her main research interests and fields are light-matter interaction in quantum materials, ultrafast spectroscopy, coherent phonon dynamics, nonlinear acoustics, and energy transport at the nanoscale.
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