GIULIO CERULLO ‘Two-dimensional Electronic Spectroscopy from the Visible to the Ultraviolet’
Two-dimensional (2D) spectroscopy is the “ultimate” ultrafast optical experiment, since it provides the maximum amount of information that can be extracted from a system within third-order nonlinear spectroscopy. The first applications were with IR pulses, resonant with vibrational transitions. Recently, 2D techniques have been extended to the visible and UV ranges, targeting electronic transitions. 2D electronic spectroscopy (2DES) allows fundamentally new insights into the structure and dynamics of multi-chromophore systems, measuring how the electronic states of molecules within a complex interact with one another and transfer electronic excitations . This presentation will review the experimental techniques currently used to perform 2DES in the visible range and will introduce our approach to 2DES, based on a passive birefringent interferometer for the generation of phase-locked pump pulses . We will present a few exemplary results on multi-chromophoric systems and nanostructures [3, 4] and finally discuss the prospects of extending 2D techniques to the UV range , of interest for biomolecules such as DNA and proteins.
Seminar, September 4, 2017, 15:00. Blue Lecture Room
Hosted by Frank Koppens