Kyushu University

Sumitomo Electric Industries, Limited

National Institute of Information and Communications Technology, Incorporated

Nissan Chemical Industries Limited

Shiyoshi Yokoyama

Isao Aoki

Hidehisa Tazawa

Hideki Miki

Akira Otomo

Masaaki Ozawa

Kei Yasui

Kazuhiro Yamamoto

Keisuke Odoi

Tsubasa Kashino

Daisuke Maeda

Hiroki Miura

A nonlinear optically active copolymer having satisfactory orientation characteristics and able to allow for reduction in heat-induced orientation relaxation of a nonlinear optical material, and a nonlinear optical material obtained using the copolymer. The copolymer including at least a repeating unit A having adamantyl group and a repeating unit B having a nonlinear optically active moiety in one molecule, and an organic nonlinear optical material including the copolymer as a component.

Nonlinear optically active copolymer into which alicyclic group has been introduced

Problem to Be Solved: to provide a chromophore having a far superior nonlinear optical activity to conventional chromophores and to provide a nonlinear optical element comprising said chromophore. Solution: a chromophore comprising a donor structure D, a &#x3c0;-conjugated bridge structure B, and an acceptor structure A, the donor structure D comprising an aryl group substituted with a substituted oxy group; and a nonlinear optical element comprising said chromophore.

Second-order nonlinear optical compound and nonlinear optical element comprising the same

There is provided an optical waveguide which has appropriate orientation properties, a production process of which is simple so as to be suitable for producing an electro-optical element, and is able to reduce power consumption of the element due to excellent electro-optical properties, and further can be formed into a thin film and be layered; and a material for the optical waveguide. A cladding material of an optical waveguide, characterized by comprising a polymer compound including a triarylamine structure, and a nonlinear optical compound; and an optical waveguide produced by using the cladding material.

High refractive index cladding material and electro-optical polymer optical waveguide

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Fukuoka, Japan

Shiyoshi Yokoyama