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Plasmon properties of hybrid metallic ring/disk system

Plasmon properties of hybrid metallic ring/disk system. d 2. D. d 1. Feng Hao , Peter Nordlander Laboratory for Nanophotonics , Department of Physics and Astronomy Rice University, Houston, TX, USA Stefan A. Maier Experimental Solid State Group, Physics Department

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Plasmon properties of hybrid metallic ring/disk system

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  1. Plasmon properties of hybrid metallic ring/disk system d2 D d1 FengHao, Peter Nordlander Laboratory for Nanophotonics, Department of Physics and Astronomy Rice University, Houston, TX, USA Stefan A. Maier Experimental Solid State Group, Physics Department Imperial College, London, UK SPIE Optics + Photonics Aug. 14th , 2008

  2. Plasmon Hybridization of concentric Ag ring/disk nanocavity Max: 91 Fabricated in IMEC Max: 23 Max: 112 J. Aizpurua et al PRL 90, 057401 (2003) - + Energy (eV)‏ Max:18 Max: 120 d1=200nm d2=150nm Subradiance enhance the sharpening of the linewidth! D=130nm Extinction (a.u.)‏ F. Hao et al PRB 76, 245417 (2007)

  3. Linewidthtunability D=100nm D=130nm D=150nm D=160nm D=170nm d1=200nm d2=180nm H=50nm Extinction (a.u.)‏ Plasmon Energy (eV)‏

  4. Wavelength tunability d1=200nm d2=150nm D=90nm H=50nm d1=200nm d2=150nm D=120nm H=50nm Extinction (a.u.)‏ d1=200nm d2=180nm D=150nm H=50nm d1=200nm d2=180nm D=150nm H=25nm d1=600nm d2=540nm D=450nm H=75nm Wavelength (nm)‏

  5. Symmetry breaking: Retardation θ E k θ=45° θ=0° Max: 119 Max: 110 Max: 24 Max: 38 Max: 21 Max: 11 Extinction (a.u.)‏ θ=90° Wavelength (nm)‏ Max: 102 Max: 41 A common substrate for both SERS and SEIRA ! Max: 41 Max: 36 Wavelength (nm)‏

  6. Symmetry breaking: Geometric λ=2801 nm λ=1469 nm λ=1398 nm λ=1398 nm λ=2666 nm E k λ=2726 nm Extinction (a.u.)‏ Wavelength (nm)‏ Wavelength (nm)‏

  7. Plasmon hybridization of nonconcentric ring/disk system E E k k + - Plasmon Energy (eV)‏ Extinction (a.u.)‏

  8. Fano interference in nonconcentric ring/disk λ=2726nm |α| (a.u.)‏ λ=1398nm λ=1583nm + - Wavelength (nm)‏ Fano model: |α| from FDTD |α| fitted by Fano model Individual resonances in Fano model

  9. Electromagnetically Induced Transparency Bright mode Dark mode k1, γ1 Γ k2, γ2 F1 F2 C.L. Garrido Alzar et al Am. J. Phys. 70 (1), 37-41 (2002)

  10. Electromagnetically Induced Transparency (cont...) - + θ E k λ=2726nm λ=1417nm Extinction (a.u.)‏ θ=0° θ=15° λ=937nm λ=768nm θ=30° θ=45° θ=60° θ=90° Wavelength (nm)‏

  11. Conclusion θ ` E k + θ=0° - θ=15° θ=30° θ=45° θ=60° θ=90°

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