Hannover 2013 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 3: SYED: Electronic 2D Spectroscopy from Small to Large Systems I

MO 3.2: Hauptvortrag

Montag, 18. März 2013, 11:30–12:00, E 415

Beatings in Electronic 2D Spectroscopy — •Tönu Pullerits — Chemical Physics, Lund University, Sweden

Ever since the first report of oscillating electronic 2D signals in photosynthetic light harvesting complexes, such observations have received considerable attention by the community leading to various exciting interpretations.

Taking a Fourier transform over the waiting time t2 visualizes the oscillatory signal amplitude, phase and damping in a 3D representation. Such a third order electronic 3D spectroscopy contains detailed information about evolution of coherences created by the excitation sequence of the laser pulses. The physical nature of the coherences will be discussed and possible explanation of the observed long lifetimes will be given.