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Abstract
Large, flawless and transparent silica monoliths were prepared at room temperature by solvent evaporation method and loaded with dye. The composites containing dye molecules were characterized by X-ray diffraction, transmission electron microscopy, Uv–vis and photoluminescence spectra. A red-shift in photoluminescence spectrum was observed from the composite monolith compared with that of laser dye in C2H5OH solution. The property of laser narrowing has been shown when the composites are pumped at p = 355 nm by nitrogen laser.
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