Anomalously polarized Raman band

{
  "id": "MLC-T-CHM-000636",
  "term": "Anomalously polarized Raman band",
  "field": "Chemistry",
  "definition": "A Raman band whose depolarization ratio exceeds 0.75, the upper limit for an ordinary depolarized band in normal Raman scattering with plane-polarized excitation. Such values turn up often in surface-enhanced resonance Raman spectra. They indicate that the scattering tensor is not purely symmetric, for example because it has an antisymmetric component, which is absent from non-resonant scattering.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "Raman band",
    "depolarization ratio",
    "surface-enhanced resonance Raman spectroscopy"
  ],
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 738 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/anomalously-polarized-raman-band/"
}