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Proceedings Paper

All-dielectric nanostructures for low-loss field enhanced spectroscopy and imaging (Conference Presentation)
Author(s): Taka-aki Yano; Yuta Tsuchimoto; Tomohiro Hayashi; Masahiko Hara

Paper Abstract

Dielectric nanostructures with high refractive index and low optical loss have attracted considerable attention as an alternative to plasmonic nanostructures. We experimentally demonstrated to control the visible electromagnetic resonances of Si-based core-shell nanostructures by thermally varying the core-shell ratio. We also found a Fano resonance which was generated by the interference between the electric and magnetic dipole moments excited in the core-shell nanostructures. The all-dielectric nanostructures realized low energy loss and high electromagnetic field enhancement comparable with that exhibited by plasmonic nanostructures. These unique optical properties would enable us to demonstrate effective field-enhanced spectroscopy and imaging with low heat generation.

Paper Details

Date Published: 11 November 2016
PDF: 1 pages
Proc. SPIE 9925, Nanoimaging and Nanospectroscopy IV, 99250K (11 November 2016); doi: 10.1117/12.2238904
Show Author Affiliations
Taka-aki Yano, Tokyo Institute of Technology (Japan)
Yuta Tsuchimoto, Tokyo Institute of Technology (Japan)
Tomohiro Hayashi, Tokyo Institute of Technology (Japan)
Masahiko Hara, Tokyo Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 9925:
Nanoimaging and Nanospectroscopy IV
Prabhat Verma; Alexander Egner, Editor(s)

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