Abstract
Planar thin films of dye-doped silica were prepared by sol-gel synthesis. The optical properties of the films were characterized by transmittance measurements in the visible-infrared range and by photoluminescence. Micropatterns whose feature size was on the order of 2.4 μm, were imprinted on the film surface by a simple soft lithography approach. An optical microscope interfaced to a charge-coupled device camera was used to image the imprinted patterns and to analyze the patterned films photoluminescence. A sensitive spectral narrowing of the emission, which occurred only in micropatterned films, was attributed to the lateral confinement of the luminescence due to the micrometer-scale modulation of refractive index produced by the embossing procedure.
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Arena, A., Patanè, S., Saitta, G. et al. Preparation, characterization, and micropatterning of laser-dye-doped sol-gel films. Journal of Materials Research 17, 2095–2098 (2002). https://doi.org/10.1557/JMR.2002.0309
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DOI: https://doi.org/10.1557/JMR.2002.0309