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Ultradirectional optical nanoantennas with high radiation efficiency by core–shell nanoparticles

Ultradirectional optical nanoantennas with high radiation efficiency by core–shell nanoparticles Abstract. A Yagi-Uda-like optical nanoantenna consisting of metallo-dielectric core–shell nanoparticles has been proposed, and its major characteristics have been investigated theoretically and numerically. Compared with all-dielectric nanoantennas and plasmonic nanoantennas, the proposed nanoantenna may exhibit better directivity and Purcell factor. In addition, the antenna shows high radiation efficiency over 65% for broadband operation as well. This core–shell nanoantenna, allowing a more compact design, may find potential applications in nanoscale lasers, photovoltaic, and energy-harvesting devices. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Nanophotonics SPIE

Ultradirectional optical nanoantennas with high radiation efficiency by core–shell nanoparticles

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References (39)

Publisher
SPIE
Copyright
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Subject
Research Papers; Paper
ISSN
1934-2608
eISSN
1934-2608
DOI
10.1117/1.JNP.11.016005
Publisher site
See Article on Publisher Site

Abstract

Abstract. A Yagi-Uda-like optical nanoantenna consisting of metallo-dielectric core–shell nanoparticles has been proposed, and its major characteristics have been investigated theoretically and numerically. Compared with all-dielectric nanoantennas and plasmonic nanoantennas, the proposed nanoantenna may exhibit better directivity and Purcell factor. In addition, the antenna shows high radiation efficiency over 65% for broadband operation as well. This core–shell nanoantenna, allowing a more compact design, may find potential applications in nanoscale lasers, photovoltaic, and energy-harvesting devices.

Journal

Journal of NanophotonicsSPIE

Published: Jan 1, 2017

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