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The structure and physical properties of a thin titania sol-gel layer prepared on silicon and silica surfaces were examined. Spectroscopic (FTIR, UV-VIS spectroscopy), refractive index (ellipsometry) and microscopic (light microscopy and SEM/EDS) tools were used to examine both chemical uniformity and physical uniformity of the sol-gel glass layers. The conditions for the fabrication of uniform layers...
Using the emission for the blue OLED component of a HTC Android Phone, a Rhodamine 123 doped silica mesostructured shell, fabricated by evaporative self-assembly on a super hydrophobic surface, is excited with blue light and the fluorescence image taken. The results demonstrate the potential of smart mobile platforms as optical hardware for portable and intelligent diagnostics as well as illustrating...
A novel method for fabrication of complex gold nanostructures is presented. Fractal aggregations of ethylenediaminetetraacetic acid (EDTA) chelates formed in seconds during solvent evaporation are used as masks for gold plating. SEM analysis shows evidence of general features on several scales from 100 μm down to considerably less than 100 nm with complete metal coverage.
We make a quantitative investigation of the interferometric side diffraction technique for characterization of fibre Bragg gratings. As opposed to more commonly used non-interferometric alternatives, this method also allows for determination of the grating's distributed phase. It is shown that for weak gratings the detected power and phase are directly proportional to the amplitude and phase of the...
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