Two-Dimensional Electronic Spectroscopy Using Rotating Optical Flats

Patrick C. Tapping, Yin Song, Yoichi Kobayashi, Gregory D. Scholes, Tak W. Kee

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)1053-1061
Number of pages9
JournalJournal of Physical Chemistry A
Issue number5
StatePublished - Feb 6 2020

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry


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