Local field enhancement of pillar nanosurfaces for SERS

Alessia Polemi; Sabrina M. Wells; Nickolay V. Lavrik; Michael J. Sepaniak; Kevin L. Shuford

doi:10.1021/jp106540q

Local field enhancement of pillar nanosurfaces for SERS

Alessia Polemi, Sabrina M. Wells, Nickolay V. Lavrik, Michael J. Sepaniak, Kevin L. Shuford

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

23 Scopus citations

Abstract

We present studies on the analysis and characterization of a unique nanosurface used for Surface-Enhanced Raman Spectroscopy. The optical properties of a nanostructure composed of dielectric pillars that support plasmonic nanoparticles have been investigated. A theoretical analysis has been performed to determine the structural properties that localize the electric field around the silver disk. We define an enhancement factor in terms of the local field integrated over the nanoparticle surface and find that this figure of merit varies considerably depending upon the pillar attributes. An analytic model is presented and validated via full wave analysis, which elucidates the optical effects occurring in the nanostructure. Starting from the basic phenomenology associated with a single pillar structure, we show that several different effects combine to create a global resonance.

Original language	English
Pages (from-to)	18096-18102
Number of pages	7
Journal	Journal of Physical Chemistry C
Volume	114
Issue number	42
DOIs	https://doi.org/10.1021/jp106540q
State	Published - Oct 28 2010

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title = "Local field enhancement of pillar nanosurfaces for SERS",

abstract = "We present studies on the analysis and characterization of a unique nanosurface used for Surface-Enhanced Raman Spectroscopy. The optical properties of a nanostructure composed of dielectric pillars that support plasmonic nanoparticles have been investigated. A theoretical analysis has been performed to determine the structural properties that localize the electric field around the silver disk. We define an enhancement factor in terms of the local field integrated over the nanoparticle surface and find that this figure of merit varies considerably depending upon the pillar attributes. An analytic model is presented and validated via full wave analysis, which elucidates the optical effects occurring in the nanostructure. Starting from the basic phenomenology associated with a single pillar structure, we show that several different effects combine to create a global resonance.",

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T1 - Local field enhancement of pillar nanosurfaces for SERS

AU - Polemi, Alessia

AU - Wells, Sabrina M.

AU - Lavrik, Nickolay V.

AU - Sepaniak, Michael J.

AU - Shuford, Kevin L.

PY - 2010/10/28

Y1 - 2010/10/28

N2 - We present studies on the analysis and characterization of a unique nanosurface used for Surface-Enhanced Raman Spectroscopy. The optical properties of a nanostructure composed of dielectric pillars that support plasmonic nanoparticles have been investigated. A theoretical analysis has been performed to determine the structural properties that localize the electric field around the silver disk. We define an enhancement factor in terms of the local field integrated over the nanoparticle surface and find that this figure of merit varies considerably depending upon the pillar attributes. An analytic model is presented and validated via full wave analysis, which elucidates the optical effects occurring in the nanostructure. Starting from the basic phenomenology associated with a single pillar structure, we show that several different effects combine to create a global resonance.

AB - We present studies on the analysis and characterization of a unique nanosurface used for Surface-Enhanced Raman Spectroscopy. The optical properties of a nanostructure composed of dielectric pillars that support plasmonic nanoparticles have been investigated. A theoretical analysis has been performed to determine the structural properties that localize the electric field around the silver disk. We define an enhancement factor in terms of the local field integrated over the nanoparticle surface and find that this figure of merit varies considerably depending upon the pillar attributes. An analytic model is presented and validated via full wave analysis, which elucidates the optical effects occurring in the nanostructure. Starting from the basic phenomenology associated with a single pillar structure, we show that several different effects combine to create a global resonance.

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VL - 114

SP - 18096

EP - 18102

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 42

ER -

Local field enhancement of pillar nanosurfaces for SERS

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