Polarization-dependent vibrational shifts on dielectric substrates. Issue 30 (21st July 2020)

• Record Type: Journal Article
• Authors: Yang, C.; Wang, W.; Nefedov, A.; Wang, Y.; Mayerhöfer, T. G.; Wöll, C.
• Is Part Of: Physical chemistry chemical physics. Volume 22:Issue 30(2020)
• Page Start: 17129
• Page End: 17133
• Publication Date: 2020-07-21
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/d0cp02399j
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : On dielectrics, infrared spectra of adsorbed molecules recorded in reflection can depend strongly on the polarization of the incident light. Abstract : The interaction of light with matter at surfaces of dielectrics strongly depends on polarization. Here, we present the first infrared spectroscopic evidence for significant polarization effects in the spectroscopic detection of adsorbate vibrational frequencies. In addition to much larger peak intensities for p-polarized light relative to s-polarization, a small but distinct blue shift was identified for CO adsorbed at the surfaces of two prototype dielectric substrates, CeO2 (111) and CaCO3 (10.4). A simulation using a layer model yields very good agreement with experiment.