Novel crosslinked guest-host system with stable second-order nonlinearity
Journal
Journal of Macromolecular Science - Pure and Applied Chemistry
Journal Volume
A29
Journal Issue
12
Pages
1115-1127
Date Issued
1992
Author(s)
Abstract
Abstract An epoxy-based nonlinear optical (NLO) polymeric material incorporating 4-(4′-nitrophenylazo) phenylamine has been synthesized and subsequently functionalized with acryloyl groups. A glass transition temperature (T 8)of 108°C and a degradation temperature (air) of 251°C were recorded. After crosslinking at 160°C for 2 hours, the T 8 of the polymer increased to 146°C. In order to increase the nonlinear optical chromophore concentration and the crosslinking density, the crosslink-able NLO dye, 2,4-acryloyloxy (4′-phenylazo nitrobenzene), was processed and poled in this epoxy-based NLO material matrix in a manner similar to a typical guest-host system, and thermally crosslinked under the above condition in the poled phase. The crosslinked guest-host material was found to be amorphous with a T 8 of approximately 132°C. It also exhibits a second-order nonlinear optical coefficient d 33 of 14.14 pm/V at a maximum doping level of 33% by weight of the NLO dye, and retains 93% of its original d 33 value after being subjected to thermal treatment at 100°C for 168 hours. The behavior of the crosslinked polymer and the crosslinked guest-host polymer is discussed.
SDGs
Type
journal article