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Keywords:

  • surface plasmon resonance;
  • plasmonics;
  • near-field;
  • hotspots;
  • metamaterials
Thumbnail image of graphical abstract

Circularly polarized light imparts a sense of rotation on the electron density in ring-shaped gold nanostructures. As a consequence, the near-field enhancement becomes homogeneous on the surface of the nanostructures, thereby increasing the opportunity for interaction with molecules. This type of nanostructured samples can find a broad range of applications in chemical processes where the interaction between molecules and local field enhancements play an important role.