Two-Photon Absorption with Polarization Control in Chiral Compounds
Abstract
This report presents the progress made on the project Two-photon absorption with polarization control in chiral compounds in the last period (September 30th/2017 to September 29th/2018). In previous reports we presented some initial results on second and third order nonlinearities in the chiral polymers. In this last period we have been able to conclude the investigation on the Hyper-Rayleigh scattering in the polybinaphthalenes with polarization control. We observed that the first-order hyperpolarizability values for left-circularly polarized light is higher than for right-circularly polarized light, which is in fact related to the polymer symmetry (left-handed). Also, the chirality of the polymer increases significantly the nonlinear response, either by eliminating the dipolar nteractions between chromophores, or by the chiral contribution itself. We have also finalized the study of the effect of polarization control on the chiral polymer, which revealed the existence of a hidden two-photon absorption state.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 12, 2019
- Accession Number
- AD1087612
Entities
People
- Cleber R Mendonca