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research article

Focusing and Extraction of Light mediated by Bloch Surface Waves

Angelini, Angelo
•
Barakat, Elsie  
•
Munzert, Peter
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2014
Scientific Reports

The control of emission from localized light sources is an objective of outstanding relevance in nanophotonics. In a recent past, a large number of metallic nanostructures has been proposed to this end, wherein plasmonic modes are exploited as energy carriers on a subwavelength scale. As an interesting alternative, we present here the use of surface modes on patterned dielectric multilayers to deliver electromagnetic power from free-space to localized volumes and vice versa. Thanks to this low-loss energy transfer, proper periodic ring structures are shown to provide a subwavelength focusing of an external radiation onto the multilayer surface. By reciprocity, the radiated power from emitters within the ring center is shown to be efficiently beamed in the free-space, with a well-controlled angular divergence. This mechanism overcomes some important limitations involved in the all-plasmonic approach, while opening new opportunities for hybrid devices in photon management applications such as optical sensing and lighting.

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Type
research article
DOI
10.1038/srep05428
Web of Science ID

WOS:000337890600002

Author(s)
Angelini, Angelo
Barakat, Elsie  
Munzert, Peter
Boarino, Luca
De Leo, Natascia
Enrico, Emanuele
Giorgis, Fabrizio
Herzig, Hans Peter  
Pirri, Candido Fabrizio
Descrovi, Emiliano
Date Issued

2014

Publisher

Nature Publishing Group

Published in
Scientific Reports
Volume

4

Article Number

5428

Editorial or Peer reviewed

NON-REVIEWED

Written at

EPFL

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Available on Infoscience
August 15, 2014
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/105841
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