Share Email Print
cover

Proceedings Paper

Theoretical study of optical pockels and Kerr coefficients of polyenes
Author(s): I. D. L. Albert; S. Ramasesha
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

We report here the numerically exact Pockels' and Kerr's coefficients of polyenes within the Pariser-Parr Pople Model. We have computed the model exact polarizability of polyenes ot chain length, N=6,8 and 10 at various static electric fields and excitation frequencies. From a 3rd degree polynomial fit of the model exact polarizability 1(Q;Q,O) (linear term) and t(Q;Q,O,O) (2nd order term) are obtained. The Pockels and Kerr coefficients are calculated from J and t. In polyenes the Pockels coefficients are small and the Kerr coefficients dominate and are the largest when the field is applied along the chain axis. The coefficients, a(Q;Q), 1(Q;Q,O) and t(Q;Q,O,O) all increase with chain length. a(Q;Q)and t(Q;Q,O,O) have the usual power law dependence and have exponent values as 1.54 and 3.78 respectively which are in agreement with the values reported in the literature. The coefficients a(Q;Q), .(Q;Q,O) and t(Q;Q,O,O) increases with increase in the excitation frequency, for frequencies below the two photon resonance value.

Paper Details

Date Published: 1 March 1991
PDF: 11 pages
Proc. SPIE 1436, Photochemistry and Photoelectrochemistry of Organic and Inorganic Molecular Thin Films, (1 March 1991); doi: 10.1117/12.27451
Show Author Affiliations
I. D. L. Albert, Indian Institute of Science (India)
S. Ramasesha, Indian Institute of Science (India)


Published in SPIE Proceedings Vol. 1436:
Photochemistry and Photoelectrochemistry of Organic and Inorganic Molecular Thin Films
Marcus F. Lawrence; Arthur Jesse Frank; S. Ramasesha; Carl C. Wamser, Editor(s)

© SPIE. Terms of Use
Back to Top