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Non-plasmonic nanoantennas for surface enhanced spectroscopies with ultra-low heat conversion

Abstract: Nanoplasmonics has recently revolutionized our ability to control light on the nanoscale. Using metallic nanostructures with tailored shapes, it is possible to efficiently focus light into nanoscale field 'hot spots'. High field enhancement factors have been achieved in such optical nanoantennas, enabling transformative science in the areas of single molecule interactions, highly enhanced nonlinearities and nanoscale waveguiding. Unfortunately, these large enhancements come at the price of high optical losses due to absorption in the metal, severely limiting real-world applications. Via the realization of a novel nanophotonic platform based on dielectric nanostructures to form efficient nanoantennas with ultra-low light-into-heat conversion, here we demonstrate an approach that overcomes these limitations. We show that dimer-like silicon-based single nanoantennas produce both high surface enhanced fluorescence and surface enhanced Raman scattering, while at the same time generating a negligible temperature increase in their hot spots and surrounding environments.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: Nature communications, 2015, 4(6), 7915

Editorial: Nature Publishing Group

 Año de publicación: 2015

Nº de páginas: 8

Tipo de publicación: Artículo de Revista

 DOI: 10.1038/ncomms8915

ISSN: 2041-1723

Url de la publicación: https://doi.org/10.1038/ncomms8915

Autores/as

CALDAROLA M.

CORTÉS, E.

RAHMANI, M.

ROSCHUK, T.

GRINBLAT, G.

OULTON, R.F.

BRAGAS, A.V.

MAIER, S.A.