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 Nd+3 doped phosphate glass nanoparticles suspended in nonanoic acid. The spectroscopic properties of our material were consistent with those of bulk Nd+3 doped materials and therefore suitable for laser development. The fluorescence peak of the 4F3/24I11/2 transition varied with particle size between 1047nm and 1057nm which represents a shift from the 1052nm line observed in bulk glass. The lifetime of the 4F3/2 metastable state was measured to vary between 20μs and 70μs depending upon the average particle radius compared to 98μs in bulk.

© 2011 Optical Society of America

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