Wavepacket theory of dynamic absorption spectra in femtosecond pump-probe studies

William Pollard Jr.; Richard A. Mathies

doi:10.1117/12.17899

1 April 1990 Wavepacket theory of dynamic absorption spectra in femtosecond pump-probe studies

William Pollard Jr., Richard A. Mathies

Proceedings Volume 1209, Picosecond and Femtosecond Spectroscopy from Laboratory to Real World; (1990) https://doi.org/10.1117/12.17899
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

Abstract

Dynamic absorption spectroscopy takes advantage of the spectral width of ultrafast femtosecond pulses to measure complete time-resolved absorption spectra with a single pulse. To quantitatively analyze these experiments, we have developed a time-dependent theory for dynamic absorption spectroscopy which generalizes the usual wavepacket picture of optical absorption to the unique case of nonstationary initial states. In our treatment, the spectrum of an initial nonstationary state is seen to arise from the time-dependent overlap of wavepackets propagating on both the final and initial potential surfaces of the transition. Calculations modelling the 6 fs experiments on Nile Blue and bacteriorhodopsin are presented.

Citation Download Citation

William Pollard Jr. and Richard A. Mathies "Wavepacket theory of dynamic absorption spectra in femtosecond pump-probe studies", Proc. SPIE 1209, Picosecond and Femtosecond Spectroscopy from Laboratory to Real World, (1 April 1990); https://doi.org/10.1117/12.17899

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