Orientational effects in electric-field-induced second-harmonic generation

Andrews, D L and Sherborne, B S (1986) Orientational effects in electric-field-induced second-harmonic generation. Journal of Physics B: Atomic and Molecular Physics, 19 (24). pp. 4265-4274. ISSN 0022-3700

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Abstract

The theory of electric-field-induced second-harmonic generation is developed within the framework of quantum electrodynamics. Using a recently developed exact averaging procedure to account for the anisotropy introduced to a dipolar molecular fluid by the static electric field, the polarisation dependence of the process is investigated. A number of experimental arrangements are suggested which allow a discrimination to be made between the two mechanisms involved: the third-order optical route facilitated by the field-induced anisotropy, and the fourth-order electro optical route. This allows measurement of the corresponding non-linear optical and electro-optical tensor parameters. The full temperature and field-strength dependences are presented in detail, and it is shown that in two particular polarisation cases, that of helicity conversion, and where the static field and pump polarisation are perpendicular to the polarisation of the harmonic, the usual approximation for the orientational average is incomplete and produces misleading results.

Item Type: Article
Faculty \ School: Faculty of Science > School of Chemistry
Depositing User: Pure Connector
Date Deposited: 18 Jan 2016 16:05
Last Modified: 15 Dec 2022 02:46
URI: https://ueaeprints.uea.ac.uk/id/eprint/56456
DOI: 10.1088/0022-3700/19/24/026

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