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IBS-CMSD Colloquium_Dr. Jayachander Borker(July 19)

작성자 : Center for Molecular Spectroscopy and Dynamics 등록일 : 2017-07-10 조회수:9303

   

     IBS Center for Molecular Spectroscopy and Dynamics

 

COLLOQUIUM

 

 

        SPEAKER
Dr. Jayachander Borker (IBS Center for Molecular Spectroscopy and Dynamics)


        TITLE
Resonant Femtosecond Stimulated Raman Scattering Spectroscopy: An Nonperturbative Formalism


        ABSTRACT
Femtosecond stimulated Raman Scattering (FSRS) spectroscopy is a set of   vibrational spectroscopic techniques designed to probe nuclear dynamics with high temporal and spectral resolution. In a typical application, FSRS is a three-pulse experimental technique. A short actinic pump initiates the process to be studied, which is subsequently probed by a pair of Raman pulses. The latter are picosecond narrow-band Raman pump and a femtosecond broad-band Raman probe. The theory of FSRS is based on the perturbative solution of time-dependent Schrödinger equation in terms of system-field interaction. Herein, I describe an alternative method of simulation of FSRS spectra, which is based on the solution of nonperturbative equation of motion. Such a method is quite general and applicable for arbitrary shapes and durations of the Raman pulses, accounts for the excited-state absorption, and describes nonstationary preparation of the system by an actinic pulse. Moreover, the present method is applicable for arbitrary field strengths of the photochemical pump.


        DATE AND VENUE
July 19, 2017 (Wednesday, 5:00 - 6:00 pm)  

Seminar Room 116, KU R&D Center

 

 

        LANGUAGE
English