Method for replicating periodic nonlinear coefficient patterning during and after growth of epitaxial ferroelectric oxide films
US5654229A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1995 |
| Grant date | Aug 5, 1997 |
| Priority date | — |
| Expiry date | Apr 26, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S117/918
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for providing an nonlinear, frequency converting optical QPM waveguide device by growing a first ferroelectric oxide film or layer on a second ferroelectric layer or medium wherein, in first and second embodiments, respectively, the second layer is initially provided with a periodic nonlinear coefficient pattern or a periodic pattern comprising a seed layer. During the growth of the first layer, the periodic pattern formed in the second layer, is replicated, transformed or induced into the first layer resulting in a plurality of substantially rectangular prismatic-shaped domains in the first layer having the periodic nonlinear coefficient pattern status based upon the periodic patterning of the second layer. In a third embodiment, the periodic nonlinear coefficient pattern may be introduced into the first layer after completion of its growth, and the periodic nonlinear coefficient pattern status of the first layer, at the interface between the first and second layers, is transposed or migrated into the second layer forming a plurality of substantially rectangular prismatic-shaped domains in the second layer having the periodic nonlinear coefficient pattern status of the fi…
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