Fabrication of ferroelectric domain reversals

Details Fabrication of ferroelectric domain reversals Fabrication of ferroelectric domain reversals

1995-09-20

1998-04-28

Fiorilla, Christopher A.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Nonresinous material only

264 124, 264 127, 264430, B29D 1100, G02B 100

Patent

active

057440735

ABSTRACT:
A method for fabricating domain reversals in predetermined periods without the occurrence of localized variations in refractive index. Localized areas of a unipolarized ferroelectric material which is made of an LiNbO.sub.3 substrate, or the like, and possesses a nonlinear optical effect are exposed to electron beams in a predetermined pattern, so that domain reversals are defined. Thereafter, this ferroelectric material is subjected to a heat treatment at a temperature below the Curie temperature of the ferroelectric material.

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"Milliwatt-Order Blue-Light Generation in Periodically Domain-Inverted LiTaO.sub.3 waveguide," Optics Letters, vol. 16, No. 15; Aug. 1, 1991; pp. 1156-1158.
"Fabrication of Periodic Domain Grating in LiNbO.sub.3 by Electron Beam Writing for Application of Nonlinear Optical Processes," Electronics Letters, vol. 27, No. 14; Jul. 4, 1991; pp. 1211-1222.
"Interactions Between Light Waves In A Nonlinear Dielectric," Physical Review, vol. 121, No. 6; Sep. 15, 1962; pp. 1919-1939.

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