Abstract

We synthesize silver nanoparticles in porous glass having a mean pore size of 17 nm. We show that when the free pore space that accompanies these particles is filled with an analyte, the peak in the silver-particle plasmon resonance band shifts as a function of the analyte index of refraction, and its amplitude increases. Numerical modeling confirms these experimental results. We show that the plasmon band amplitude increases by a factor of 2 as the index of refraction of the medium increases from 1 to 1.47; the sensitivity of the spectral location of the band to a change in the index of refraction of the medium is 80 nm per index-of-refraction unit.

© 2017 Optical Society of America

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