Polarization phenomena in resinic esters of photothermoplastic devices for applications to holographic optical switching

Polarization phenomena in three resinous esters (Staybelite Ester (SE10), Foral 85, and Foral 105) for photothermoplastic devices have been investigated by thermally stimulated current spectroscopy. The relaxation mode observed below room temperature with the same characteristics in the three esters has been assigned to localized movements of four to six bonds. The relaxation mode appearing above room temperature has been associated with the dielectric manifestation of the glass transition. It involves cooperative movements of main chains. The analysis of the corresponding relaxation map shows that the structure of Foral 85 is the most disordered