1. Open Access Kent State
  2. Measurements of Kleinman-Disallowed Hyperpolarizability in Conjugated Chiral Molecules
Author(s)
Abstract

We have designed a hyper-Rayleigh scattering scheme to measure six scalar invariants of the squared hyperpolarizability tensor beta(2). OUT theoretical approach expresses the rotational invariants of the irreducible beta components as scalars, which eliminates the need for difficult frame transformations. We applied our scheme to several conjugated chiral molecules and found that there are significant Kleinman-disallowed pseudotensor contributions to their hyperpolarizability. These components, along with a large optical rotation and the results of quantum-chemical calculations, indicate a handed nonplanar delocalization of the charge-transfer system in such molecules as predicted by quantum-chemical calculations and are expected to lead to macroscopic second-harmonic generation in axially aligned polymer materials. Pseudotensor contributions to the hyperpolarizability in chiral molecules were found to be as large as the vector contribution in p-nitroaniline. We qualitatively investigated the dispersion in the Kleinman-disallowed components and confirmed that these components are smaller at longer wavelengths. (C) 1998 Optical Society of America.
Format
Article
Publication Date
1998-01-01
Publication Title
Journal of the Optical Society of America B-Optical Physics
Volume
15
Issue
1
First Page
289
Last Page
301
Subject
Rights
http://rightsstatements.org/vocab/InC/1.0/
Community
Chemical Physics Interdisciplinary Program
Comments

This paper was published in the Journal of the Optical Society of America B and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/JOSAB.15.000289. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Permalink https://oaks.kent.edu/cpippubs/40
Hubbard, S., Petschek, R., Singer, K., D’Sidocky, N., Hudson, C., Chien, L.-C., Henderson, C., & Cahill, P. (1998). Measurements of Kleinman-Disallowed Hyperpolarizability in Conjugated Chiral Molecules (1–). Journal of the Optical Society of America B-Optical Physics. https://oaks.kent.edu/node/1188
Hubbard, S., Rolfe Petschek, Kenneth Singer, N. D’Sidocky, C. Hudson, Liang-Chy Chien, C. Henderson, and P. Cahill. 1998. “Measurements of Kleinman-Disallowed Hyperpolarizability in Conjugated Chiral Molecules”. Journal of the Optical Society of America B-Optical Physics. https://oaks.kent.edu/node/1188.
Hubbard, S., et al. Measurements of Kleinman-Disallowed Hyperpolarizability in Conjugated Chiral Molecules. Journal of the Optical Society of America B-Optical Physics, 1 Jan. 1998, https://oaks.kent.edu/node/1188.