Tuning the thickness and orientation of single au pyramids for improved refractive index sensitivities

Jeunghoon Lee; Warefta Hasan; Teri W. Odom

doi:10.1021/jp8111155

Tuning the thickness and orientation of single au pyramids for improved refractive index sensitivities

Jeunghoon Lee, Warefta Hasan, Teri W. Odom

Northwestern University

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

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.

Original language	English
Pages (from-to)	2205-2207
Number of pages	3
Journal	Journal of Physical Chemistry C
Volume	113
Issue number	6
DOIs	https://doi.org/10.1021/jp8111155
Publication status	Published - Feb 12 2009

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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