Tuning the Thickness and Orientation of Single Au Pyramids for Improved Refractive Index Sensitivities
The Journal of Physical Chemistry C2009Vol. 113(6), pp. 2205–2207
Citations Over TimeTop 14% of 2009 papers
Abstract
This paper describes three ways to tune the multipolar surface plasmon resonances of Au pyramidal particles: (1) by varying their thickness; (2) by controlling their relative orientation on a surface; and (3) by changing the refractive index of the surrounding media. We found that as the index of the medium was increased that the plasmon resonances red-shifted linearly from visible to near infrared wavelengths. By screening the different geometric parameters, we found that 25-nm thick pyramids in a tip-up orientation produced the largest refractive index sensitivities.
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