Sum frequency generation spectroscopy

{
  "id": "MLC-T-CHM-011577",
  "term": "Sum frequency generation spectroscopy",
  "field": "Chemistry",
  "definition": "A non-linear optical spectroscopic technique that probes surfaces and interfaces by generating a signal at the sum of two incident laser frequencies. This process is forbidden in centrosymmetric media, making it inherently surface-specific. The technique provides vibrational spectra of molecules adsorbed at interfaces, offering insights into molecular orientation and bonding.",
  "synonyms": [
    "vibrational sum frequency spectroscopy (VSFS)"
  ],
  "subject": "Analytical Chemistry",
  "references": [
    "PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1793 (https://doi.org/10.1515/pac-2019-0404)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/sum-frequency-generation-spectroscopy/"
}