title: Nanoimprint fabrication of gold nanocones with approximately 10 nm tips for enhanced optical interactions.
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.
authors: Optoelectronics Research Centre, Tampere University of Technology, Department of Physics, Optics Laboratory, Tampere, Finland. juha.kontio@tut.fi
authors: Juha M
authors: JM
authors: Kontio
authors: Hannu
authors: H
authors: Husu
authors: Janne
authors: J
authors: Simonen
authors: Mikko J
authors: MJ
authors: Huttunen
authors: Juha
authors: J
authors: Tommila
authors: Markus
authors: M
authors: Pessa
authors: Martti
authors: M
authors: Kauranen