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‘Fairy Chimney’‐Shaped Tandem Metamaterials as Double Resonance SERS Substrates |
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| Authors: | Neval A Cinel Serkan Bütün Gülay Erta? Ekmel Özbay |
| Affiliation: | 1. Nanotechnology Research Center, Department of Electrical and Electronics Engineering, Bilkent University, 06800 Bilkent, Turkey;2. Department of Electrical Engineering and Computer Science, Northwestern University, 60208, Evanston, IL, USA;3. Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey;4. Nanotechnology Research Center, Department of Electrical and Electronics Engineering, Department of Physics, Bilkent University, 06800 Bilkent, Turkey |
| Abstract: | A highly tunable design for obtaining double resonance substrates to be used in surface‐enhanced Raman spectroscopy is proposed. Tandem truncated nanocones composed of Au‐SiO2‐Au layers are designed, simulated and fabricated to obtain resonances at laser excitation and Stokes frequencies. Surface‐enhanced Raman scattering experiments are conducted to compare the enhancements obtained from double resonance substrates to those obtained from single resonance gold truncated nanocones. The best enhancement factor obtained using the new design is 3.86 × 107. The resultant tandem structures are named after “Fairy Chimneys” rock formation in Cappadocia, Turkey. |
| Keywords: | localized surface plasmons surface enhanced raman scattering double resonances Au‐SiO2‐Au tandem nanocones |