QM2 - Quantum Matter and Materials | January 27, 14:30

Experiments on vibrational energy pooling and transport in condensed phases using a mid-ir superconducting nanowire single photon detector

Alec Wodtke

Superconducting nanowire single-photon detectors (SNSPDs) provide sufficient sensitivity to enable laser induced fluorescence (LIF) experiments in the mid-infrared, an exciting technical development for physical chemistry given the importance of vibrational spectroscopy to molecular science. In this talk, I will describe how an SNSPD works and how to use it. I will also present results of experiments on the vibrational dynamics of monolayers and multilayers of solid CO adsorbed at the surface of a NaCl crystal, to show the capabilities of time-resolved infrared LIF spectroscopy and provide observations of astonishing phenomena arising from dipole-dipole coupling between molecules. In these experiments, a laser light pulse excites about half of the CO to its


Max Planck Institute for Biophysical Chemistry, Göttigen
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Contact: Thomas Michely