Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 155, Issue 9, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0057649
Keywords
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Funding
- AFOSR Biophysics program [FA9550-21-1-0098, FA9550-19-1-0267]
- Ecole Polytechnique
- National Science Foundation [PHY-1914608]
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This translation introduces a rapid-scanning fluorescence-detected two-dimensional electronic spectroscopy method that can acquire linear and nonlinear signals in a single measurement, and is able to correct spectral phase distortions and accurately phase the data.
We present a rapid-scanning approach to fluorescence-detected two-dimensional electronic spectroscopy that combines acousto-optic phase-modulation with digital lock-in detection. This approach shifts the signal detection window to suppress 1/f laser noise and enables interferometric tracking of the time delays to allow for correction of spectral phase distortions and accurate phasing of the data. This use of digital lock-in detection enables acquisition of linear and nonlinear signals of interest in a single measurement. We demonstrate the method on a laser dye, measuring the linear fluorescence excitation spectrum as well as rephasing, non-rephasing, and absorptive fluorescence-detected two-dimensional electronic spectra.
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