Spatially resolved second-harmonic-generation investigations of proton-induced refractive-index changes in LiNbO3
- 1 February 1989
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 65 (3), 1253-1256
- https://doi.org/10.1063/1.343018
Abstract
Doping profiles generated by electric‐field‐assisted proton diffusion in LiNbO3 bulk material are investigated, spatially resolved by absorption and by second‐harmonic‐generation measurements. The results allow a direct correlation of the refractive‐index changes with the local proton density. It is shown that protons are the only mobile ions under the experimental conditions applied (600 °C, 100 V/cm), whereas lithium ions do not move under these conditions. Similar results were obtained for samples doped with deuterium.Keywords
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