Periodically poled Cs-exchanged RbTiOAsO4 optical waveguides: High-resolution x-ray diffraction, scattering, and topography study
UNSPECIFIED (1998) Periodically poled Cs-exchanged RbTiOAsO4 optical waveguides: High-resolution x-ray diffraction, scattering, and topography study. PHYSICAL REVIEW B, 58 (10). pp. 6074-6080. ISSN 1098-0121Full text not available from this repository.
A crystal of periodically poled RbTiOAsO4, in which optical channel waveguides have been produced by Cs ion exchange, has been studied using combined optical and x-ray diffraction imaging, reciprocal-space mapping, and diffuse scattering. The lattice strains which result from the uptake of Cs in periodically poled RbTiOAsO4 are determined and are found to be Delta c/c = +0.02%-0.04% for different orientations of the sample in the (00 (1) over bar) plane, Delta b/b=-0.02% and Delta a/a congruent to 0%, to within the resolution of reciprocal-space measurement. The detailed microstructural features of the periodically domain-inverted structure and the modulation of the Cs uptake in the ion-exchanged regions are shown directly in x-ray diffraction images from the (00 (1) over bar) surface. Evidence of defect clusters, formed during the ion-exchange processing and of size approximately 180 nm, is presented from analysis of the x-ray diffuse scattering around the Bragg peaks from the ion-exchanged layer and substrate. Discussions of the domain-inversion and ion-exchange processing and the consequences for the microstructure of the waveguiding layer and its properties are given in terms of our observations.
|Item Type:||Journal Article|
|Subjects:||Q Science > QC Physics|
|Journal or Publication Title:||PHYSICAL REVIEW B|
|Publisher:||AMER PHYSICAL SOC|
|Date:||1 September 1998|
|Number of Pages:||7|
|Page Range:||pp. 6074-6080|
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