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Type: Journal article
Title: Two-dimensional electronic spectroscopy using rotating optical flats
Author: Tapping, P.C.
Song, Y.
Kobayashi, Y.
Scholes, G.D.
Kee, T.W.
Citation: The Journal of Physical Chemistry A: Isolated Molecules, Clusters, Radicals, and Ions; Environmental Chemistry, Geochemistry, and Astrochemistry; Theory, 2020; 124(5):1053-1061
Publisher: American Chemical Society
Issue Date: 2020
ISSN: 1089-5639
Statement of
Patrick C. Tapping, Yin Song, Yoichi Kobayashi, Gregory D. Scholes, and Tak W. Kee
Abstract: In two-dimensional electronic spectroscopy (2DES), precise control of the arrival time of ultrashort laser pulses is critical to correlating the molecular states that are accessed in the experiment. In this work, we demonstrate a 2D electronic spectrometer design with an interferometric phase stability of ∼λ/250 at 600 nm. First, we present a new method for controlling pulse delay times based on transmission through pairs of optical flats rotated perpendicular to the beam propagation direction. Second, the calibration methods required to achieve adequate timing precision are also reported. Compared to existing designs using translating wedges, the rotating optical flats can achieve equivalent optical delay with a shorter path length in glass, reducing errors due to spectral dispersion of the broadband laser pulses used in 2DES. Our approach presents a simple, low-cost technique for multidimensional optical spectroscopy that is capable of resolving complex light-induced dynamics.
Rights: © 2020 American Chemical Society
DOI: 10.1021/acs.jpca.0c00285
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Chemical Engineering publications

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