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Kaniber M, Schraml K, Regler A, et al. Surface plasmon resonance spectroscopy of single bowtie nano-antennas using a differential reflectivity method. Sci Rep. 2016;6:23203doi: 10.1038/srep23203.
Kaniber, M., Schraml, K., Regler, A., Bartl, J., Glashagen, G., Flassig, F., Wierzbowski, J., & Finley, J. J. (2016). Surface plasmon resonance spectroscopy of single bowtie nano-antennas using a differential reflectivity method. Scientific reports, 623203. https://doi.org/10.1038/srep23203
Kaniber, M, et al. "Surface plasmon resonance spectroscopy of single bowtie nano-antennas using a differential reflectivity method." Scientific reports vol. 6 (2016): 23203. doi: https://doi.org/10.1038/srep23203
Kaniber M, Schraml K, Regler A, Bartl J, Glashagen G, Flassig F, Wierzbowski J, Finley JJ. Surface plasmon resonance spectroscopy of single bowtie nano-antennas using a differential reflectivity method. Sci Rep. 2016 Mar 23;6:23203. doi: 10.1038/srep23203. PMID: 27005986; PMCID: PMC4804333.
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Sci Rep. 2016 Mar 23;6:23203. doi: 10.1038/srep23203.

Surface plasmon resonance spectroscopy of single bowtie nano-antennas using a differential reflectivity method.

Scientific reports

M Kaniber, K Schraml, A Regler, J Bartl, G Glashagen, F Flassig, J Wierzbowski, J J Finley

Affiliations

  1. Walter Schottky Institut and Physik Department, Technische Universität München, Am Coulombwall 4, 85748 Garching b. München, Germany.
  2. Institute for Advanced Study, Technische Universität München, Lichtenbergstrasse 2a, Garching, Germany, 85748.
  3. Nanosystems Initiative Munich (NIM), Schellingstraße 4, 80799 München, Germany.

PMID: 27005986 PMCID: PMC4804333 DOI: 10.1038/srep23203

Abstract

We report on the structural and optical properties of individual bowtie nanoantennas both on glass and semiconducting GaAs substrates. The antennas on glass (GaAs) are shown to be of excellent quality and high uniformity reflected by narrow size distributions with standard deviations for the triangle and gap size of = 4.5 nm = 2.6 nm and = 5.4 nm = 3.8 nm, respectively. The corresponding optical properties of individual nanoantennas studied by differential reflection spectroscopy show a strong reduction of the localised surface plasmon polariton resonance linewidth from 0.21 eV to 0.07 eV upon reducing the antenna size from 150 nm to 100 nm. This is attributed to the absence of inhomogeneous broadening as compared to optical measurements on nanoantenna ensembles. The inter-particle coupling of an individual bowtie nanoantenna, which gives rise to strongly localised and enhanced electromagnetic hotspots, is demonstrated using polarization-resolved spectroscopy, yielding a large degree of linear polarization of ρmax ~ 80%. The combination of highly reproducible nanofabrication and fast, non-destructive and non-contaminating optical spectroscopy paves the route towards future semiconductor-based nano-plasmonic circuits, consisting of multiple photonic and plasmonic entities.

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