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Keywords:

  • SERS;
  • surface enhanced Raman scattering;
  • plasmonic;
  • optical antennae
Thumbnail image of graphical abstract

A two-dimensional array of gold optical antennas integrated with a one-dimensional array of gold strips and mirrors is introduced and fabricated. The experimental results show that this design achieves average surface-enhanced Raman scattering (SERS) enhancement factors as high as 1.2 × 1010, which is more than two orders of magnitude larger than optical antennas without the gold strips and gold mirror.