Mitchell Physics Building
College Station, Texas 77843-4242
Recently the technical advances made researchers able to perform two-dimensional electronic spectroscopy in visible regime and correlate transition frequencies that evolve in different time intervals, although pico- and femto-second time-resolved spectroscopies of electronic transitions have come of age. 2DES correlates excitation and emission energies as a function of a delay time between excitation and emission/transient-excitation events, within the bandwidth of the laser pulse. 2D spectra are plotted as a function of absorption and emission, and cross-peaks appear where the two frequencies are different, indicating many-body interactions and excited-state relaxation. Here I will briefly introduce the recent development of using 2DES combined with dual comb technique to resolve the dipole-dipole interaction between Alkali atoms. The results show the high resolution which exposes the hyperfine structure of atoms.
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