Mukherjee SS1, Skoff DR, Middleton CT, Zanni MT.
J Chem Phys. 2013 Oct 14;139(14):144205. doi: 10.1063/1.4824638.This paper presents the implementation of 3D IR spectroscopy by adding a second pump beam to a two-beam 2D IR spectrometer. An independent mid-IR pulse shaper is used for each pump beam, which can be programmed to collect its corresponding dimension in either the frequency or time-domains. Due to the phase matching geometry employed here, absorptive 3D IR spectra are automatically obtained, since all four of the rephasing and non-rephasing signals necessary to generate absorptive spectra are collected simultaneously. Read More