Method of controlling the domain of a nonlinear ferroelectric op

Details Method of controlling the domain of a nonlinear ferroelectric op Method of controlling the domain of a nonlinear ferroelectric op

1991-07-15

1993-03-09

Arnold, Bruce Y.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359251, 365117, 365145, G02F 103, G11C 1122

Patent

active

051930234

ABSTRACT:
A method of controlling the domain of a nonlinear ferroelectric optics substrate to form an inverted-domain structure in one major surface of a single-domain nonlinear ferroelectric optics substrate. A first electrode is formed in a first major surface of a nonlinear ferroelectric optics substrate in a pattern corresponding to a desired pattern of an inverted-domain structure to be formed, a second electrode is formed on a second major surface opposite the first major surface in a pattern corresponding to that of the first electrode or in a solid film, a dc voltage or a pulse voltage is applied across the first and second electrodes to form local, inverted domains in the desired pattern in the first major surface of the nonlinear ferroelectric optics substrate. An insulating film may be formed between the first electrode and the first major surface to avoid damaging crystals of the nonlinear ferroelectric optics substrate by the current that flow across the nonlinear ferroelectric optics substrate when the dc voltage or the pulse voltage is applied across the first and second electrodes.

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patent: 4995705 (1991-02-01), Yoshinaga et al.
"Thermal Capacitive-Ferroelectric Storage Device"; IBM Tech. Disclosure Bulletin, vol. 15, No. 4 (Sep. 1972) p. 1294.
PCT WO/09094 Application Aug. 20, 1990 "Controlling regions of ferroelectric domains".

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