Two-color two-dimensional Fourier transform electronic spectroscopy with a pulse-shaper
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Updated: Jun 28, 2026

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
Published on: May 29, 2018
Jeffrey A Myers1, Kristin L M Lewis, Patrick F Tekavec
1Department of Physics and Biophysics, University of Michigan, Ann Arbor, MI 48109, USA.
Abstract:
We report two-color two-dimensional Fourier transform electronic spectroscopy obtained using an acousto-optic pulse-shaper in a pump-probe geometry. The two-color setup will facilitate the study of energy transfer between electronic transitions that are widely separated in energy. We demonstrate the method at visible wavelengths on the laser dye LDS750 in acetonitrile. We discuss phase-cycling and polarization schemes to optimize the signal-to-noise ratio in the pump-probe geometry. We also demonstrate that phase-cycling can be used to separate rephasing and nonrephasing signal components.
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