Frequency-Domain Two-Dimensional Infrared Spectroscopy using an Acousto-Optic Programmable Dispersive Filter

José Alberto de La Paz (1) , Adeline Bonvalet (1) , Manuel Joffre (1)

1 LOB - Laboratoire d'Optique et Biosciences

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.

Domaines: Optique [physics.optics]

José Alberto de La Paz, Adeline Bonvalet, Manuel Joffre. Frequency-Domain Two-Dimensional Infrared Spectroscopy using an Acousto-Optic Programmable Dispersive Filter. Optics Express, 2019, 27 (4), pp.4140-4146. ⟨10.1364/OE.27.004140⟩. ⟨hal-01906724⟩