A1 Journal article (refereed)
Influence of Fano resonance on SERS enhancement in Fano-plasmonic oligomers (2019)


Dutta, A., Alam, K., Nuutinen, T., Hulkko, E., Karvinen, P., Kuittinen, M., Toppari, J. J., & Vartiainen, E. M. (2019). Influence of Fano resonance on SERS enhancement in Fano-plasmonic oligomers. Optics Express, 27(21), 30031-30043. https://doi.org/10.1364/OE.27.030031


JYU authors or editors


Publication details

All authors or editorsDutta, Arpan; Alam, Khairul; Nuutinen, Tarmo; Hulkko, Eero; Karvinen, Petri; Kuittinen, Markku; Toppari, J. Jussi; Vartiainen, Erik M.

Journal or seriesOptics Express

eISSN1094-4087

Publication year2019

Volume27

Issue number21

Pages range30031-30043

PublisherOptical Society of America

Publication countryUnited States

Publication languageEnglish

DOIhttps://doi.org/10.1364/OE.27.030031

Publication open accessOpenly available

Publication channel open accessOpen Access channel

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/65774


Abstract

Plasmonic oligomers can provide profound Fano resonance in their scattering responses. The sub-radiant mode of Fano resonance can result in significant near-field enhancement due to its light trapping capability into the so-called hotspots. Appearance of these highly localized hotspots at the excitation and/or Stokes wavelengths of the analytes makes such oligomers promising SERS active substrates. In this work, we numerically and experimentally investigate optical properties of two disk-type gold oligomers, which have different strength and origin of Fano resonance. Raman analysis of rhodamine 6G and adenine with the presence of the fabricated oligomers clearly indicates that an increment in the strength of Fano resonance can improve the Raman enhancement of an oligomer significantly. Therefore, by suitable engineering of Fano lineshape, one can achieve efficient SERS active substrates with spatially localized hotspots.


Keywordsphotochemistryoligomeroptical propertiesscattering (physics)resonance

Free keywordsplasmonic oligomers


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Ministry reportingYes

VIRTA submission year2019

JUFO rating1


Last updated on 2024-12-10 at 04:45