Absorption and order parameter dependency to temperature and poling field in polymer-dye films oriented by corona poling

Abstract

Second-order nonlinear optical (NLO) effects can be observed in materials with noncentro symmetric structures. In order to achieve such structure in the initially isotropic-doped polymer films, they were aligned in an electric field during heating up to the glass transition temperature. In this experimental work, we studied the NLO thin film properties of azo dye as guest molecules oriented in a polymer host by corona-onset poling. Also, the orientational order of nonlinear molecules is measured. We have shown that corona-onset poling at elevated temperature (COPET) is effective in orienting optically nonlinear guest molecules in a host polymer.