Claims
- 1. An optical light switch or light modulator device with a polymeric nonlinear optical component comprising a transparent solid medium of a liquid crystalline polymer which is characterized by a recurring monomeric unit corresponding to the formula: ##STR20## where P' is a main chain polymer unit; m is an integer of at least 10; S' is a flexible spacer group having a linear chain length of between about 1-25 atoms; X is --NR--, --O-- or --S--; R is hydrogen or a C.sub.1 -C.sub.4 alkyl group; Y is ##STR21## and Z is an electron-donating group or an electron-withdrawing group; and where the polymer has a glass transition temperature above about 40.degree. C.; wherein the transparent nonlinear optical medium exhibits a third order nonlinear optical susceptibility .chi..sup.(3) of at least about 1.times.10.sup.-11 esu as measured at 1.91 .mu.m excitation wavelength, and the optical medium has an isotropic molecular configuration with macroscopic centrosymmetry.
- 2. An optical light switch or light modulator device with a polymeric nonlinear optical component comprising a transparent solid medium of a liquid crystalline polymer which is characterized by a recurring monomeric unit corresponding to the formula: ##STR22## where n is an integer between about 4-20; X.sup.1 is --NR.sup.1 --, --O--, or --S--; R.sup.1 is hydrogen or methyl; Z.sup.1 is --NO.sub.2, --CN or --CF.sub.3 ; and where the polymer has a weight average molecular weight in the range between about 5000-200,000, and a glass transition temperature above about 40.degree. C.; wherein the transparent nonlinear optical medium exhibits a third order nonlinear optical susceptibility .chi..sup.(3) of at least about 1.times.10.sup.-11 esu as measured at 1.91 .mu.m excitation wavelength, and the optical medium has an isotropic molecular configuration with macroscopic centrosymmetry.
- 3. An optical light switch or light modulator device with a polymeric nonlinear optical component comprising a transparent solid medium of a liquid crystalline polymer which is characterized by a recurring monomeric unit corresponding to the formula: ##STR23## where n is an integer between about 4-20; X.sup.1 is --NR.sup.1 --, --O--, or --S--; R.sup.1 is hydrogen or methyl; Z.sup.1 is --NO.sub.2, --CN or --CF.sub.3 ; and where the polymer has a weight average molecular weight in the range between about 5000-200,000, and a glass transition temperature above about 40.degree. C.; wherein the transparent nonlinear optical medium exhibits a third order nonlinear optical susceptibility .chi..sup.(3) of at least about 1.times.10.sup.-11 esu as measured at 1.91 .mu.m excitation wavelength, and the optical medium has an isotropic molecular configuration with macroscopic centrosymmetry.
Parent Case Info
This is a division of application Ser. No. 915,180, filed Oct. 3, 1986, now U.S. Pat. No. 4,762,912.
Government Interests
This invention was made with Government support under Contract Number F49620-84-C-0110 awarded by the Department of Defense. The Federal Government has certain rights in this invention.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4358391 |
Finkelmann |
Nov 1982 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
915180 |
Oct 1986 |
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