Abstract
We have synthesized a colloidal laser gain material that should possess many of the advantages of solid-state media without the main disadvantage of poor thermal performance. The colloid consists of doped phosphate glass nanoparticles suspended in nonanoic acid. The spectroscopic properties of our material were consistent with those of bulk doped materials and therefore suitable for laser development. The fluorescence peak of the transition varied with particle size between and which represents a shift from the line observed in bulk glass. The lifetime of the metastable state was measured to vary between and depending upon the average particle radius compared to in bulk.
© 2011 Optical Society of America
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