Patent ID: 6623665
Filing Date: 2003-09-23
Classification: G02F

Abstract:
A non-linear optical device comprising a NLO composition which comprises a chromophore compound of formula (I):EDâ€”Bâ€”EWâ€ƒâ€ƒ(I) where ED is an electron donating moiety, B is an unsaturated bridging moiety, and EW is the electron withdrawing moiety of the formula (II): wherein each of A1, A2, A3 and A4 is independently C1-6 alkyl, C3-7, cycloalkyl, aryl, â€”CN, â€”COR, â€”COOR, â€”COOH or â€”CH&boxH;C(R)2, wherein R is a C1-4 alkyl group, with the proviso that at least one of A1, A2, A3 or A4 is an electron withdrawing group when one or more A1, A2, A3 or A4 are a C1-8 alkyl, a C3-7, cycloalkyl, or an aryl group.