Elastic-Recoil-Detection Measurement of Instabilities in Proton-Exchanged Lithium Niobate

摘要

The H and Li profiles in proton-exchanged (PE) LiNbO sub 3 have been measured using elastic recoil detection (ERD). Profiles were determined as a function of crystal orientation, time after PE, annealing temperature, MgO-doping, and added Li-benzoate to the benzoic acid proton source. The proton-exchange process produces H/sub x/Li/sub 1-x/NbO sub 3 structures where x stabilizes near values of x approx. = 0.5 or x approx. = 0.7 - 0.75 depending on specific conditions. The ERD measurements represent the first direct and simultaneous measurements of H- and Li-concentrations in PE LiNbO sub 3 and their variation with process parameters. 16 refs., 6 figs. (ERA citation 13:022125)