Back to results
US 5,670,091 AGranted
Nonlinear optical materials with reduced aromaticity and bond length alternation
AssigneeCalifornia Institute of Technology
InventorsSeth R. Marder, Lap-Tak Cheng
Life of this patent
Estimating the term…
Abstract
Compositions for use in non-linear optical devices. The compositions have high first molecular electronic hyperpolarizability (.beta.) and therefore display high second order non-linear optical properties when incorporated into non-linear optical devices. The acceptor and donor groups which are used in the compositions, along with the .pi.(pi)-bridge length is chosen to optimize second-order non-linear optical responses.
Claims8
A nonlinear optical device comprising a composition of matter which exhibits a second-order nonlinear optical response, said composition having the formula:
- ##STR21## wherein Z is CH.dbd.CH, O, NH, S or Se;
- A is ##STR22## R is H, alkyl, aryl, (CH.sub.2).sub.x OH where x=1 to 8, or (CH.sub.2).sub.x SH where x=1 to 8;
- R' is H, alkyl, aryl, (CH.sub.2).sub.y' OH where y'=1 to 8, or (CH.sub.2).sub.y' SH where y'=1 to 8;
- ML.sub.n is a lewis acid;
- wherein B is ##STR23## Y is CH.dbd.CH, O, NH, S or Se;
- D is OR", NR"R"' or SR" where
- R" is H, alkyl, aryl or (CH.sub.2).sub.w OH where w=1 to 8;
- R"' is H, alkyl, aryl or (CH.sub.2).sub.z OH where z=1 to 8;
- or where NR"R"' is derived from a cyclic amine of the form N(CH.sub.2).sub.1 where 1=3-10, and
- wherein m is 0 to 15, n=1 to 15 and p=0 to 15;
- except when A is (2) then Y is S, and B is (13) or (14), m=0 to 10, n=0 to 15 and p=1 to 15,
- where the asterisk indicates the point of attachment on the acceptor and donor.
9 more elements
Dependencies are inferred from the claim text.