Welcome to Physics
The University of Connecticut is consistently ranked the Number 1 Public University in New England. The University's first Physical Review article was published in 1899, and the first physics course was taught in 1918. The Department of Physics granted its first Ph.D. in 1954. One (so far) of the Department's Graduate Students, David M. Lee, went to receive a Nobel Prize in Physics.
The Department of Physics offers a wide range of graduate and undergraduate courses, as well as a vibrant research program with 29 full-time faculty.
Monday, December 18th, 2017
04:00 PM - 05:00 PM
Storrs CampusPhysics Building, P121
Department of Physics,
University of Connecticut
Femtosecond nonlinear optical spectroscopy of carotenoids and single wall carbon nanotubes
Nonlinear optical spectroscopy can provide the most comprehensive picture of the optical response of any quantum system. The energy structure and excited state dynamics of the system can be revealed unambiguously, using such a comprehensive time- and frequency- resolved (both detection and excitation frequencies) optical response. My research has been focused on the measurement and interpretation of the optical responses of different samples using two of the most advanced ultrafast nonlinear optical spectroscopy techniques including Transient Absorption (TA) and Transient Grating (TG) spectroscopies. Transient absorption spectroscopy measures the time- and frequency- resolved (detection) amplitude of the optical response of the system after an initial excitation to a specific energy state. Heterodyne transient grating spectroscopy, which employs a more sophisticated light-matter interaction geometry, measures the phase of the optical response in addition to its time- and frequency- resolved (detection) amplitude. The latest results of the measurements on carotenoids and single wall carbon nanotubes (SWNTs) will be presented.