Shape effects in the localized surface plasmon resonance of single nanoholes in thin metal films.

  title={Shape effects in the localized surface plasmon resonance of single nanoholes in thin metal films.},
  author={Borja Sepulveda and Yury Alaverdyan and Joan Alegret and Mikael K{\"a}ll and Peter L Johansson},
  journal={Optics express},
  volume={16 8},
We report on the polarization-dependent optical response of elongated nanoholes in optically thin gold films. We measured elastic scattering spectra of spatially isolated ellipsoidal nanoholes with varying aspect ratio and compared the results to electrodynamic simulations. Both experiments and theory show that the plasmon mode that is polarized parallel to the short axis of the ellipsoidal hole red-shifts with increasing aspect ratio. This behavior is completely opposite to the case of… CONTINUE READING
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