Measurements of the phase of femtosecond nonlinear optical signal fields opened up the possibility of measuring optical frequency Two-Dimensional Fourier Transform (2DFT) spectra that are in some ways analogous to 2DFT NMR spectra.  Since initial demonstration and development at optical frequencies, Femtosecond 2DFT spectroscopy has been extended to the infrared and ultraviolet and widely used to study gases, liquids, solids, glasses and proteins.  An overview of the principles, capabilities, and prospects for femtosecond 2DFT spectroscopy will be followed by discussion of recent results on molecules and photosynthetic proteins, where the usual adiabatic picture of fast electrons and slow vibrations fails for all accessible coordinates.

Award Address  (Ahmed Zewail Award in Ultrafast Science and Technology sponsored by Ahmed Zewail Endowment Fund established by the Newport Corporation (Newport)). 2D femtosecond spectroscopy

245th National Meeting (2013)

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