Second harmonic generation in poled polymer films

Abstract

We report the observation of second harmonic generation in a new class of organic polymeric materials, namely, electric field poled polymer glasses. Both the observed second harmonic coefficient (d33=6.0±1.3×10−9 esu, at 1.58 μm wavelength) and the poling process are described by a thermodynamic model that we have developed. The ability to form thin films from these materials may qualify them for integrated optics applications.

Thickness dependence of second-harmonic generation in thin films fabricated from ionically self-assembled monolayers

“…As a result of the multitude of potential frequency conversion, optical modulation, and optical switching applications that stem from the (2) second-order susceptibility, several novel methods for creating noncentrosymmetric materials incorporating organic molecules with large ␤ molecular susceptibilities have been developed over the past decade. These include electric-field poled polymers, [1][2][3] Langmuir-Blodgett films, [4][5][6] and covalent selfassembled monolayer structures. [7][8][9] We report here detailed studies of a ionically self-assembled monolayer technique for the creation of noncentrosymmetric organic thin films with substantial (2) values.…”

Nonlinear Optical Polymers Derived From Organic/Inorganic Composites

“…The results clearly indicate that the stability of poled and cured A204/ASD has significantly been improved. After over 40 h at 100 'C, a reduction of 45% in d 3 3 was observed for the poled and cured A204/ASD. Most of this loss was in the first few hours of heating.…”

“…Second-order NLO properties are present in the polymer when the NLO chromophores are aligned in a noncentrosymmetric manner by the poling technique [3]. In order to prevent the randomization of the poled (aligned) NLO molecules in a polymer matrix, NLO chromophores are usually incorporated into a polymer which has a high glass transition temperature (Tg).…”

Low loss second‐order nonlinear optical polymers based on all organic sol‐gel materials

“…2 Second-order NLO properties are present in the polymer when the NLO chromophores are aligned in a noncentrosymmetric manner by the poling technique. 3 In order to prevent the randomization of the poled (aligned) NLO molecules in a polymer matrix, NLO chromophores are usually incorporated into a polymer which has a high glass transition temperature (Tg). This is due to the fact that the molecular motions of NLO chromophores are closely associated with the Tg of the polymer.…”