Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 133, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3464332
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Funding
- Indian Institute of Science, the Department of Science and Technology
- CSIR
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Ultrafast Raman loss spectroscopy (URLS) enables one to obtain the vibrational structural information of molecular systems including fluorescent materials. URLS, a nonlinear process analog to stimulated Raman gain, involves a narrow bandwidth picosecond Raman pump pulse and a femtosecond broadband white light continuum. Under nonresonant condition, the Raman response appears as a negative (loss) signal, whereas, on resonance with the electronic transition the line shape changes from a negative to a positive through a dispersive form. The intensities observed and thus, the Franck-Condon activity (coordinate dependent), are sensitive to the wavelength of the white light corresponding to a particular Raman frequency with respect to the Raman pump pulse wavelength, i.e., there is a mode-dependent response in URLS. (C) 2010 American Institute of Physics. [doi:10.1063/1.3464332]
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