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Chemical identification of individual fine dust particles with resonant plasmonic enhancement of nanoslits in the infrared

We demonstrate the capability of single plasmonically active nanoslits for sensing of small fine dust particles via surface-enhanced infrared absorption (SEIRA) spectroscopy. Investigating phononic excitations of individual spherical silica particles coupled to the plasmonic excitation of single nan...

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Bibliographic Details
Main Authors: Vogt, Jochen (Author) , Huck, Christian (Author) , Tzschoppe, Michael (Author) , Neubrech, Frank (Author) , Pucci, Annemarie (Author)
Other Authors: Zimmermann, Sören (Other) , Fatikow, Sergej (Other)
Format: Article (Journal)
Language:English
Published: February 14, 2017
In: ACS photonics
Year: 2017, Volume: 4, Issue: 3, Pages: 560-566
ISSN:2330-4022
DOI:10.1021/acsphotonics.6b00812
Online Access:Verlag, Volltext: http://dx.doi.org/10.1021/acsphotonics.6b00812
Verlag, Volltext: https://doi.org/10.1021/acsphotonics.6b00812
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Author Notes:Jochen Vogt, Sören Zimmermann, Christian Huck, Michael Tzschoppe, Frank Neubrech, Sergej Fatikow, Annemarie Pucci
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Summary:We demonstrate the capability of single plasmonically active nanoslits for sensing of small fine dust particles via surface-enhanced infrared absorption (SEIRA) spectroscopy. Investigating phononic excitations of individual spherical silica particles coupled to the plasmonic excitation of single nanoslits, we are able to detect and chemically identify single spheres with diameters of 240 nm by their enhanced phononic signal. The single silica spheres in nanoslits lead to Fano-type phononic signals on the plasmonic background. The enhancement of the phononic silica signal is highest for particles located in the middle of the slit, in accordance with the FDTD-simulated near-field distribution along the slit at resonance. Our results reveal, that resonant plasmonic nanoslits are promising substrates for SEIRA spectroscopy of fine and ultra fine dust particles and guide the way toward SEIRA based dust sensing devices.
Item Description:Gesehen am 06.09.2018
Physical Description:Online Resource
ISSN:2330-4022
DOI:10.1021/acsphotonics.6b00812

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