Open AccessFrequency-domain two-dimensional infrared spectroscopy using an acousto-optic programmable dispersive filter
Author(s) -
Jose Alberto de la Paz,
Adeline Bonvalet,
Manuel Joffre
Publication year - 2019
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.004140
Subject(s) - optics , spectroscopy , infrared , frequency domain , filter (signal processing) , spectral resolution , materials science , infrared spectroscopy , physics , computer science , spectral line , quantum mechanics , astronomy , computer vision
We report on multidimensional spectroscopy in the mid-infrared, performed using a calomel-based acousto-optic programmable dispersive filter. Although the associated spectral resolution is currently not as good as what has been previously reported using time-domain interferometers or other pulse-shaping technologies, the extreme compactness of the calomel crystal allows a straightforward implementation in a pre-existing pump-probe setup. Furthermore, the frequency-domain approach allows easy measurement of 2D slices of the multidimensional spectrum associated with a given pump frequency. We demonstrate our method with the measurement of the mid-infrared spectrum of carboxy-hemoglobin in three spectro-temporal dimensions.