Cavity-enhanced localized plasmon resonance sensing

Ralf Ameling; Lutz Langguth; Mario Hentschel; Martin Mesch; Paul V. Braun; Harald Giessen

doi:10.1063/1.3530795

Cavity-enhanced localized plasmon resonance sensing

Ralf Ameling, Lutz Langguth, Mario Hentschel, Martin Mesch, Paul V. Braun, Harald Giessen

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

Abstract

We present a method to enhance the sensing properties of a localized plasmon sensor. The concept is based on the combination of localized plasmons in nanostructures and a photonic microcavity. Metal nanorods that are placed at Bragg distance above a metal mirror form a Fabry-Ṕrot microcavity and constitute a coupled photonic-plasmonic system. The localized plasmon resonances of the nanorods and the phase shifts upon plasmon excitation are extremely sensitive to changes in the refractive index of the material surrounding the nanorods. Compared to the plasmonic nanorods alone, the coupled photonic-plasmonic system allows for a much more sensitive detection of small refractive index changes.

Original language	English (US)
Article number	253116
Journal	Applied Physics Letters
Volume	97
Issue number	25
DOIs	https://doi.org/10.1063/1.3530795
State	Published - Dec 20 2010

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3530795

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abstract = "We present a method to enhance the sensing properties of a localized plasmon sensor. The concept is based on the combination of localized plasmons in nanostructures and a photonic microcavity. Metal nanorods that are placed at Bragg distance above a metal mirror form a Fabry-Ṕrot microcavity and constitute a coupled photonic-plasmonic system. The localized plasmon resonances of the nanorods and the phase shifts upon plasmon excitation are extremely sensitive to changes in the refractive index of the material surrounding the nanorods. Compared to the plasmonic nanorods alone, the coupled photonic-plasmonic system allows for a much more sensitive detection of small refractive index changes.",

author = "Ralf Ameling and Lutz Langguth and Mario Hentschel and Martin Mesch and Braun, {Paul V.} and Harald Giessen",

note = "Funding Information: The authors thank Bernhard Fenk (MPI for Solid State Research) for the focused ion-beam support. They acknowledge financial support from the Deutsche Forschungsgemeinschaft (Grant Nos. FOR557 and SPP1391) and the Bundesministerium f{\"u}r Bildung und Forschung (Grant Nos. 13N10146 and 13N9049) as well as the Alexander-von-Humboldt foundation (Bessel prize).",

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AU - Ameling, Ralf

AU - Langguth, Lutz

AU - Hentschel, Mario

AU - Mesch, Martin

AU - Braun, Paul V.

AU - Giessen, Harald

N1 - Funding Information: The authors thank Bernhard Fenk (MPI for Solid State Research) for the focused ion-beam support. They acknowledge financial support from the Deutsche Forschungsgemeinschaft (Grant Nos. FOR557 and SPP1391) and the Bundesministerium für Bildung und Forschung (Grant Nos. 13N10146 and 13N9049) as well as the Alexander-von-Humboldt foundation (Bessel prize).

PY - 2010/12/20

Y1 - 2010/12/20

N2 - We present a method to enhance the sensing properties of a localized plasmon sensor. The concept is based on the combination of localized plasmons in nanostructures and a photonic microcavity. Metal nanorods that are placed at Bragg distance above a metal mirror form a Fabry-Ṕrot microcavity and constitute a coupled photonic-plasmonic system. The localized plasmon resonances of the nanorods and the phase shifts upon plasmon excitation are extremely sensitive to changes in the refractive index of the material surrounding the nanorods. Compared to the plasmonic nanorods alone, the coupled photonic-plasmonic system allows for a much more sensitive detection of small refractive index changes.

AB - We present a method to enhance the sensing properties of a localized plasmon sensor. The concept is based on the combination of localized plasmons in nanostructures and a photonic microcavity. Metal nanorods that are placed at Bragg distance above a metal mirror form a Fabry-Ṕrot microcavity and constitute a coupled photonic-plasmonic system. The localized plasmon resonances of the nanorods and the phase shifts upon plasmon excitation are extremely sensitive to changes in the refractive index of the material surrounding the nanorods. Compared to the plasmonic nanorods alone, the coupled photonic-plasmonic system allows for a much more sensitive detection of small refractive index changes.

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ER -

Cavity-enhanced localized plasmon resonance sensing

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