Automated polarization-dependent multidimensional coherent spectroscopy phased using transient absorption
Jared K. Wahlstrand, Galahad M. Wernsing, Jagannath Paul +1 more
An experimental apparatus is described for multidimensional optical spectroscopy with fully automated polarization control, based on liquid crystal variable retarders. Polarization dependence of rephasing two-dimensional coherent spectra are measured in a single scan, with absolute phasing performed for all polarization configurations through a single automated auxiliary measurement at the beginning of the scan. A factor of three improvement in acquisition time is demonstrated, compared to the apparatus without automated polarization control. Results are presented for a GaAs quantum well sample and an InGaAs quantum well embedded in a microcavity.
Optics Express•Oct 17, 2019•7 citations