Abstract
Dichroic :Au-antimony glass nanocomposites are synthesized in a new reducing glass (dielectric) matrix (mol%) (KBS) by a single-step melt-quench technique involving selective thermochemical reduction principle. Transmission electron microscopic images reveal hexagonal nanoparticles having major axes about . Dichroic behavior arises due to hexagonal nanoparticles of aspect ratio 1.2–1.3. nanoparticles of concentration of drastically enhances the intensity (2–5 folds) of both 536 (, green) and 645 (, red) nm emission bands of . Local field enhancement induced by surface plasmon resonance (SPR) and energy transfer from fluorescent ions are found to be responsible for enhancement while, at very high Au concentration, energy transfer from and optical reabsorption due to SPR result in quenching.
© 2009 Optical Society of America
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