Current research projects are:
Ultrafast energy carrier (electrons, phonons, etc.) dynamics in
nanoscale materials, particularly nano-engineered
thermoelectric and photovoltaic materials for energy conversion
applications. These studies employ an ultrafast laser
pump-and-probe experimental facility to investigate energy
transfer from photons to electrons to lattice heating. Coherent
phonon excitation and detection are used to understand ultrafast
interactions among energy carriers, scattering at interfaces and
boundaries, and the relation between phonon dynamics and global
energy transfer properties.
Thermal properties measurements.
We employ photoacoustic
method and femtosecond thermal reflectance method to measure
thermal conductivity of thin film and bulk materials. We have
provided measurement services to industries, academic
institutions, and government laboratories.
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Prof. Xianfan Xu, Purdue University, all rights reserved.