Copolymeric nonlinear optical media

Details Copolymeric nonlinear optical media Copolymeric nonlinear optical media

1989-01-12

1990-09-18

Maples, John S.

Compositions

Liquid crystal compositions

526250, 526291, 526296, 526310, 5263294, 5263297, 350 11, 252582, 252587, 252589, 252600, C09K 1952

Patent

active

049576550

ABSTRACT:
In a preferred embodiment this invention provides a second order nonlinear optical film medium which consists of a thermoplastic copolymer which has a crystallographic molecular alignment, and a net dipolar molecular orientation normal to the film plane. The crystallographic molecular alignment is formed by axial mechanical stressing, and the dipolar molecular orientation is induced by an electric or magnetic field.
Illustrative of an invention polymer is a copolymer of vinylidene fluoride and 4-[N-(10-methacroyloxydecyl)]-4'-nitrostilbene: ##STR1##

REFERENCES:
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patent: 4431263 (1984-02-01), Garito
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patent: 4579915 (1986-04-01), Choe
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patent: 4808332 (1989-02-01), DeMartino et al.
patent: 4822865 (1989-04-01), DeMartino et al.
patent: 4894263 (1990-01-01), Dubois et al.
Berkovic, G. et al., J. Opt. Soc. Am. B. 4(6) 945, 1987.

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