Two-Photon Absorption with Polarization Control in Chiral Compounds
Technical Report,30 Sep 2015,29 Sep 2018
INSTITUTO DE FISICA DE SAO CARLOS Santiago Chile
Pagination or Media Count:
This report presents the progress made on the project Two-photon absorption with polarization control in chiral compounds in the last period September 30th2017 to September 29th2018. 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.
- Nuclear Physics and Elementary Particle Physics