Process by which a
photon with
frequency
interacts with a non-linear medium and splits into two simultaneously emitted photons
with frequencies
and
so that the energy is conserved:
Notes:
- Also known as a parametric downconversion.
- The efficiency of the conversion process depends on the parametric gain in the non-linear
material. This in turn depends on the power of the incident radiation, the photon frequencies, their indices of refraction in
the material, and the non-linear 'hyper-susceptibility' of the material.
Source:
PAC, 2007, 79, 293
(Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006))
on page 326
Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by
A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
https://doi.org/10.1351/goldbook.
