Open AccessPolarization effect on the two-photon absorption of a chiral compound
Author(s) -
Marcelo G. Vivas,
Leonardo De Boni,
Yann Bretonnière,
Chantal Andraud,
Cleber Renato Mendonça
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.018600
Subject(s) - circular polarization , femtosecond , optics , two photon absorption , linear polarization , materials science , excited state , circular dichroism , polarization (electrochemistry) , absorption (acoustics) , linear dichroism , molecular physics , photon polarization , attenuation coefficient , photon , atomic physics , physics , chemistry , laser , crystallography , microstrip
In this report, we investigate the polarization effect (linear, elliptical and circular) on the two-photon absorption (2PA) properties of a chiral compound based in azoaromatic moieties using the femtosecond Z-scan technique with low repetition rate and low pulse energy. We observed a strong 2PA modulation between 800 nm and 960 nm as a function the polarization changes from linear through elliptical to circular. Such results were interpreted employing the sum-over-essential states approach, which allowed us to model the 2PA circular-linear dichroism effect and to identifier the overlapping of the excited electronic states responsible by the 2PA allowed band.