Strongly driven transformations in materials
Kwangu Kang, Xuan Zheng, and David G. Cahill
U.S. Department of Energy, DE-FG02-07ER46459
In collaboration with the reasearch groups of Peter Abbamonte (Physics) and Jim Zuo (MatSE), we are developing new approaches for studying the interaction of ultrafast optical pulses with materials, ultrafast energy transport at interfaces, and ultfast melting and crystallization. Pump-probe measurements of Raman vibrational spectra enable measurements of the evolution of electron and phonon temperatures on picosecond time-scales and thus allow us to determine electron-phonon and phonon-phonon coupling constants. Optical third harmonic generation is uniquely sensitive to the symmetry of a condensed phase and enables probing of phase transitions with 100 femtosecond time resolution.
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On 31 Mar 2008, 09:34.