Polarization studies in multiphoton absorption spectroscopy

Andrews, D. L. and Ghoul, W A (1981) Polarization studies in multiphoton absorption spectroscopy. The Journal of Chemical Physics, 75 (2). pp. 530-538. ISSN 0021-9606

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Abstract

Using the principles of quantum electrodynamics, the theory of two‐, three‐, and four‐photon absorption in polyatomic gases and liquids is developed. Expressions are derived for the rates of single‐frequency absorption from plane polarized, circularly polarized, and unpolarized light. It is shown that for n‐photon absorption with n?3, the rate for unpolarized radiation is in each case expressible as a linear combination of the rates for plane polarized and circularly polarized light; no such relationship exists for four‐photon absorption. For each multiphoton process, it is demonstrated how the fullest information about the symmetry properties of excited states can be derived by a simple linear processing of the results from experiments with different polarizations. A detailed examination of the selection rules is made, based on a reduction of the molecular transition tensor into irreducible components, and a new classification scheme is introduced to assist with the interpretation of experimental results. Finally, it is shown that the theory may also be applied to resonance‐enhanced multiphoton ionization spectroscopy.

Item Type:	Article
Faculty \ School:	Faculty of Science > School of Chemistry
UEA Research Groups:	Faculty of Science > Research Groups > Physical and Analytical Chemistry (former - to 2017) Faculty of Science > Research Groups > Chemistry of Light and Energy Faculty of Science > Research Groups > Centre for Photonics and Quantum Science
Depositing User:	Pure Connector
Date Deposited:	18 Jan 2016 16:02
Last Modified:	09 Feb 2023 13:42
URI:	https://ueaeprints.uea.ac.uk/id/eprint/56444
DOI:	10.1063/1.442102

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