Harmonic frequency generation

{
  "id": "MLC-T-CHM-005109",
  "term": "Harmonic frequency generation",
  "field": "Chemistry",
  "definition": "A nonlinear optical process where light interacting with a material generates new light waves at integer multiples of the input light's frequency. This phenomenon occurs when intense laser light induces a nonlinear polarization in the medium. Second harmonic generation (SHG) and third harmonic generation (THG) are common examples.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "coherent radiation",
    "laser",
    "polarizability"
  ],
  "references": [
    "PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2245 (https://doi.org/10.1351/pac199668122223)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/harmonic-frequency-generation/"
}