Novel Crosslinked Guest-Host System with Stable Second Order Nonlinearity
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 (Tg) of 108 deg C and a degradation temperature (air) of 251 deg C were recorded. After crosslinking at 160 deg C for 2 hours, the Tg of the polymer increased to 146 deg C. In order to increase the nonlinear optical chromophore concentration and the crosslinking density, the crosslinkable 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 above condition in the poled phase. The crosslinked guest-host material was found to be amorphous with a Tg of approximately 132 deg C. It also exhibits a second order nonlinear optical coefficient d33 Of 14.14 pm/V at a maximum doping level of 33 by weight of the NLO dye, and retains 93% of its original d33 value after being subjected to thermal treatment at 100 deg C for 168 hours. The behavior of the crosslinked polymer and the crosslinked guest-host polymer is discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 15, 1992
- Accession Number
- ADA251816
Entities
People
- Jayant Ram Kumar
- R. Jeng
- S. Tripathy
- Y. M. Chen
Organizations
- University of Massachusetts Lowell