Imaging Plasmon Hybridization of Fano Resonances via Hot-Electron-Mediated Absorption Mapping

Sabrina Simoncelli, Yi Li, Emiliano Cortés, Stefan A. Maier

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38 Citations (Scopus)


The inhibition of radiative losses in dark plasmon modes allows storing electromagnetic energy more efficiently than in far-field excitable bright-plasmon modes. As such, processes benefiting from the enhanced absorption of light in plasmonic materials could also take profit of dark plasmon modes to boost and control nanoscale energy collection, storage, and transfer. We experimentally probe this process by imaging with nanoscale precision the hot-electron driven desorption of thiolated molecules from the surface of gold Fano nanostructures, investigating the effect of wavelength and polarization of the incident light. Spatially resolved absorption maps allow us to show the contribution of each element of the nanoantenna in the hot-electron driven process and their interplay in exciting a dark plasmon mode. Plasmon-mode engineering allows control of nanoscale reactivity and offers a route to further enhance and manipulate hot-electron driven chemical reactions and energy-conversion and transfer at the nanoscale.

Original languageEnglish
Pages (from-to)3400-3406
Number of pages7
JournalNano Letters
Issue number6
Publication statusPublished - 13 Jun 2018
Externally publishedYes


  • dark modes
  • Fano resonances
  • hot-electrons
  • nanoscale precision
  • self-assembly
  • super-resolution

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