Mesoporous Metal Oxide Semiconductor-Clad Waveguides
The Journal of Physical Chemistry B1999Vol. 103(40), pp. 8490–8492
Citations Over TimeTop 23% of 1999 papers
Abstract
Optical waveguides were prepared by depositing a sol gel-derived titania film onto a silica substrate. The titania film is mesoporous, with pore sizes ranging from 3 to 8 nm. Deposition of the titania does not change the critical angle of total internal reflection. Thus, the titania-coated waveguides propagate light in an attenuated total reflection mode, despite the relatively high refractive index (n = 1.8 in air) of the titania film relative to the silica substrate (n = 1.5). The optical and structural properties of these films suggest the possibility of developing efficient photocatalytic reactors or improved optical chemical sensors.
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