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US 5,011,623 AGranted
Nonlinear optical material and nonlinear optical device
AssigneeCanon Kabushiki Kaisha
InventorsKazuo Yoshinaga, Takashi Kai, Koichi Egara, Yomishi Toshida, Hideaki Mitsutake, Koichi Sato, Takeshi Miyazaki
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Abstract
A nonlinear optical material is provided by mixing a polymer liquid crystal having a chiral center and a nonlinear optical compound. The polymer liquid crystal may be a ferroelectric polymer liquid crystal. The nonlinear optical material is preferably in the form of a solid solution. A nonlinear optical device is formed by orienting the nonlinear optical material to provide an optical member.
Claims6
A nonlinear optical material, comprising:
- a ferroelectric polymer liquid crystal and a nonlinear optical compound forming a solid solution, wherein
- said nonlinear optical compound has a skeleton comprising a .pi.-electron system and at least one member selected from the group consisting of electron-donating and electron-attracting groups, said nonlinear optical compound having a second order hyperpolarizability of at least 10.times.10.sup.-30 e.s.u.;
- and
- said ferroelectric liquid crystal being a side chain-type polymer having a mesogen unit in its side chain represented by ##STR10## wherein n2 is 5-5000, R is H, Cl or CH.sub.3, and M is a mesogen unit including an asymmetric carbon atom.
1 more element
Dependencies are inferred from the claim text.