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Keywords:

  • three-dimensional nanofabrication;
  • metamaterials;
  • nanoplasmonics;
  • nanoantennas;
  • direct laser writing
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We propose a novel hybrid fabrication approach that combines direct laser writing with a subsequent electron-beam lithography step. This approach allows realizing out-of-plane plasmonic nanostructures with truly nanoscopic feature sizes. The excellent quality of the obtained structures is evidenced by optical characterization of upright-standing split-ring resonator arrays fabricated along these lines.