Optimization of 3D plasmonic crystal structures for refractive index sensing

Joana Maria; Tu T. Truong; Jimin Yao; Tae Woo Lee; Ralph G. Nuzzo; Sven Leyffer; Stephen K. Gray; John A. Rogers

doi:10.1021/jp9024552

Optimization of 3D plasmonic crystal structures for refractive index sensing

Joana Maria, Tu T. Truong, Jimin Yao, Tae Woo Lee, Ralph G. Nuzzo, Sven Leyffer, Stephen K. Gray, John A. Rogers

Materials Science and Engineering

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

34 Scopus citations

Abstract

We study the refractive index sensitive transmission of a 3D plasmonic crystal that consists of a square array of subwavelength cylindrical nanowells in a polymer conformally coated with a gold film. Using extensive 3D finite-difference time-domain simulations, we investigate the effect of system parameters such as periodicity, well diameter and depth, and metal thickness on its refractive index sensitivity. These theoretical results are also confirmed experimentally in some cases. Our calculations predict an enhancement in sensitivity by an order of magnitude when the plasmonic crystal characteristics are optimized.

Original language	English (US)
Pages (from-to)	10493-10499
Number of pages	7
Journal	Journal of Physical Chemistry C
Volume	113
Issue number	24
DOIs	https://doi.org/10.1021/jp9024552
State	Published - Jun 18 2009

ASJC Scopus subject areas

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

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abstract = "We study the refractive index sensitive transmission of a 3D plasmonic crystal that consists of a square array of subwavelength cylindrical nanowells in a polymer conformally coated with a gold film. Using extensive 3D finite-difference time-domain simulations, we investigate the effect of system parameters such as periodicity, well diameter and depth, and metal thickness on its refractive index sensitivity. These theoretical results are also confirmed experimentally in some cases. Our calculations predict an enhancement in sensitivity by an order of magnitude when the plasmonic crystal characteristics are optimized.",

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AU - Maria, Joana

AU - Truong, Tu T.

AU - Yao, Jimin

AU - Lee, Tae Woo

AU - Nuzzo, Ralph G.

AU - Leyffer, Sven

AU - Gray, Stephen K.

AU - Rogers, John A.

PY - 2009/6/18

Y1 - 2009/6/18

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AB - We study the refractive index sensitive transmission of a 3D plasmonic crystal that consists of a square array of subwavelength cylindrical nanowells in a polymer conformally coated with a gold film. Using extensive 3D finite-difference time-domain simulations, we investigate the effect of system parameters such as periodicity, well diameter and depth, and metal thickness on its refractive index sensitivity. These theoretical results are also confirmed experimentally in some cases. Our calculations predict an enhancement in sensitivity by an order of magnitude when the plasmonic crystal characteristics are optimized.

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Optimization of 3D plasmonic crystal structures for refractive index sensing

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