@article{Giordano2018, 
author = {Maria C. Giordano and Stefano Longhi and Matteo Barelli and Andrea Mazzanti and Francesco Buatier de Mongeot and Giuseppe Della Valle},
title = {Plasmon hybridization engineering in self-organized anisotropic metasurfaces},
year = {2018},
journal = {Nano Research},
volume = {11},
number = {7},
pages = {3943-3956},
keywords = {gold nanostructures, metasurfaces, self-organization, plasmon hybridization, gap plasmon resonances},
url = {https://www.sciopen.com/article/10.1007/s12274-018-1974-3},
doi = {10.1007/s12274-018-1974-3},
abstract = {The engineering of self-organized plasmonic metasurfaces is demonstrated using a maskless technique with defocused ion-beam sputtering and kinetically controlled deposition. The proposed reliable, cost-effective, and controllable approach enables large-area (order of square centimeter) sub-wavelength periodic patterning with close-packed gold nanostrips. A multi-level variant of the method leads to high-resolution manufacturing of vertically stacked nanostrip dimer arrays, without resorting to lithographic approaches. The design of these self-organized metasurfaces is optimized by employing plasmon hybridization methods. In particular, preliminary results on the so-called gap-plasmon configuration of the nanostrip dimers, implementing magnetic dipole resonance in the near-infrared range, are reported. This resonance offers a superior sensitivity and field enhancement, compared with the more conventional electric dipole resonance. The translational invariance of the nanostrip configuration leads to a high filling factor of the hot spots. These advanced features make the large-area metasurface based on gap-plasmon nanostrip dimers very attractive for surface-enhanced linear and nonlinear spectroscopy (e.g., surface-enhanced Raman scattering) and plasmon-enhanced photon harvesting in solar and photovoltaic cells.}
}