On the role of permanent dipoles in second harmonic generation

Andrews, D L and Meath, W J (1993) On the role of permanent dipoles in second harmonic generation. Journal of Physics B: Atomic, Molecular and Optical Physics, 26 (23). pp. 4633-4641. ISSN 0953-4075

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Abstract

The significance of permanent electric dipoles in second harmonic generation is considered with regard to their role in both the non-linear susceptibility and also in the orientation of polar molecules. Under conditions of near-resonance with the first electronic excited state, the susceptibility is dominated by a two-level term governed by the difference between the ground and excited-state dipoles; this term also drives the harmonic conversion in electric field-induced second harmonic generation. If the resonant level is not the lowest electronic excited state, there is a secondary resonance feature which can contribute just as strongly as the two-level term, and which can dominate the harmonic conversion if the ground- and excited-state dipoles are either equal, or both zero.

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 17:07
Last Modified:	09 Feb 2023 13:42
URI:	https://ueaeprints.uea.ac.uk/id/eprint/56522
DOI:	10.1088/0953-4075/26/23/030

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