Polymeric and Hybrid Materials for Electrooptical Devices: Polar Order Dynamics

Abstract

The present contribution reviews some aspect of the exploitation of polymeric and hybrid solgel materials for optoelectronic devices. In particular a procedure addressed to experimentally investigate the order stability of systems containing NLO dipolar molecules will be discussed. A figure of merit, allowing the comparison among candidate systems for devices, is recognized in the RT d 33 decay time value. Its relation with glass transition temperature of a series of similar polymeric systems is reported. Moreover, a hybrid solgel system containing electro-optic active molecules is shown.

Silicon-organic hybrid photonics: Overview of recent advances, electro-optical effects and CMOS-integration concepts

“…One serious problem of the linear EO effect is its thermal and long-term stability due to orientational relaxation dynamics (figure 11(f)) [101,121]. However, recent advances in molecular engineering have led to increased stability.…”

Nonlinear optical materials by electrospinning technique

“…The price to be paid is the need to undergo a poling process to destroy the centrosymmetric nature which is intrinsic in such amorphous materials. A macroscopic order is typically achieved in polymeric NLO materials by the application of an external electric poling field, which induces the alignment of the molecular electric dipole moments of intrinsically axial chromophores . Postdeposition electric field orientation can be performed using different geometries, as in the case of corona poling, parallel‐plate, and coplanar‐electrode poling .…”