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Issue 12, 2019
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Plasmonic mode conversion in individual tilted 3D nanostructures

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Abstract

We investigate mode conversion in 3D asymmetric nanocones using angle-dependent linear optical spectroscopy and second-harmonic generation microscopy supported by corresponding simulations. The results prove the efficient excitation of the plasmonic out-of-plane mode that enhances the electric near-field at the sharp tip. Furthermore, we introduce two advanced fabrication processes including either etch mask transfer by tilted etching into a metallic layer or tilted electron-beam lithography followed by tilted evaporation and lift-off. These processes enable the fabrication of tilted nanostructures which can be optimized for a given purpose. The combination of the optical properties and the introduced fabrication processes enables a new design of plasmonic nanostructures for ultra-compact sensors or photon sources.

Graphical abstract: Plasmonic mode conversion in individual tilted 3D nanostructures

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Article information


Submitted
19 Dec 2018
Accepted
22 Feb 2019
First published
11 Mar 2019

Nanoscale, 2019,11, 5429-5440
Article type
Paper

Plasmonic mode conversion in individual tilted 3D nanostructures

C. Dreser, D. A. Gollmer, G. Bautista, X. Zang, D. P. Kern, M. Kauranen and M. Fleischer, Nanoscale, 2019, 11, 5429
DOI: 10.1039/C8NR10254F

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