Shallow buried waveguides made by purely thermal migration of K+ ions in glass.
Buried planar optical waveguides made by a purely thermal backdiffusion K(+)-Na(+) ion-exchange process have been demonstrated, for the first time to our knowledge, on soda-lime glass substrates. The potassium-ion concentration profile is determined using a scanning electron microscope technique, which is then correlated to the numerical simulation of the ion-exchange fabrication process.
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Department of Electrical Engineering, McGill University, 3480 University Street, Montreal, Quebec H3A 2A7, Canada.
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