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A triple-resonance Raman chip for simultaneous enhancement of Stokes and anti-Stokes lines utilizing both localized and non-localized plasmonic resonance
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering. Zhejiang University, China; South China Normal University (SCNU), China.
2015 (English)In: Journal of Optics, ISSN 2040-8978, E-ISSN 2040-8986, Vol. 17, no 10, 105001Article in journal (Refereed) Published
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Abstract [en]

In this paper we report a triple-resonance surface-enhanced Raman scattering (SERS) chip that is able to provide simultaneous field enhancement for both the Stokes and anti-Stokes lines. The structure consists of an array of periodic gold bowties placed on the surface of a uniform gold film. It can support two localized surface plasmonic resonances (LSPRs): an electric dipole binding resonance (EDBR) and a magnetic dipole resonance (MDR). A third field enhancement peak is obtained by utilizing the strong interaction between the non-localized surface plasmonic resonance (non-localized SPR) and the LSPR, which greatly raises the field enhancement for the non-localized SPR. In addition, a gold strip-line resonator is incorporated to further enhance the local field intensity. Consequently, the field enhancement of the three peaks are all increased. Compared with the same structure without strip, the periodic bowtie-strip compound structure on gold film can gain as much as similar to 22.8 times and similar to 3.6 times larger Raman intensity enhancement simultaneously for both the Stokes and anti-Stokes lines.

Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2015. Vol. 17, no 10, 105001
Keyword [en]
triple-resonance, Raman enhancement, surface plasmonic resonance
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:kth:diva-180159DOI: 10.1088/2040-8978/17/10/105001ISI: 000366161700004Scopus ID: 2-s2.0-84947598647OAI: oai:DiVA.org:kth-180159DiVA: diva2:893536
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QC 20160112

Available from: 2016-01-12 Created: 2016-01-07 Last updated: 2016-01-12Bibliographically approved

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CiteExportLink to record
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  • apa
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