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Opt Lett. 2009 Jul 1;34(13):1979-81.

Nanoimprint fabrication of gold nanocones with approximately 10 nm tips for enhanced optical interactions.

Author information

  • 1Optoelectronics Research Centre, Tampere University of Technology, Department of Physics, Optics Laboratory, Tampere, Finland. juha.kontio@tut.fi

Abstract

We show that nanoimprint lithography combined with electron-beam evaporation provides a cost-efficient, rapid, and reproducible method to fabricate conical nanostructures with very sharp tips on flat surfaces in high volumes. We demonstrate the method by preparing a wafer-scale array of gold nanocones with an average tip radius of 5 nm. Strong local fields at the tips enhance the second-harmonic generation by over 2 orders of magnitude compared with a nonsharp reference.

PMID:
19571972
[PubMed]
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