Hybrid nanoantennas for directional emission enhancement

Evgenia Rusak; Isabelle Staude; Manuel Decker; Jürgen Sautter; Andrey E. Miroshnichenko; David A. Powell; Dragomir N. Neshev; Yuri S. Kivshar

doi:10.1063/1.4903219

Hybrid nanoantennas for directional emission enhancement

Evgenia Rusak, Isabelle Staude^*, Manuel Decker, Jürgen Sautter, Andrey E. Miroshnichenko, David A. Powell, Dragomir N. Neshev, Yuri S. Kivshar

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

83 Citations (Scopus)

Abstract

Plasmonic and dielectric nanoparticles offer complementary strengths regarding their use as optical antenna elements. While plasmonic nanoparticles are well-known to provide strong decay rate enhancement for localized emitters, all-dielectric nanoparticles can enable high directivity combined with low losses. Here, we suggest a hybrid metal-dielectric nanoantenna consisting of a gold nanorod and a silicon nanodisk, which combines all these advantages. Our numerical analysis reveals a giant enhancement of directional emission together with simultaneously high radiation efficiency (exceeding 70%). The suggested hybrid nanoantenna has a subwavelength footprint, and all parameters and materials are chosen to be compatible with fabrication by two-step electron-beam lithography.

Original language	English
Article number	221109
Journal	Applied Physics Letters
Volume	105
Issue number	22
DOIs	https://doi.org/10.1063/1.4903219
Publication status	Published - 1 Dec 2014

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title = "Hybrid nanoantennas for directional emission enhancement",

abstract = "Plasmonic and dielectric nanoparticles offer complementary strengths regarding their use as optical antenna elements. While plasmonic nanoparticles are well-known to provide strong decay rate enhancement for localized emitters, all-dielectric nanoparticles can enable high directivity combined with low losses. Here, we suggest a hybrid metal-dielectric nanoantenna consisting of a gold nanorod and a silicon nanodisk, which combines all these advantages. Our numerical analysis reveals a giant enhancement of directional emission together with simultaneously high radiation efficiency (exceeding 70%). The suggested hybrid nanoantenna has a subwavelength footprint, and all parameters and materials are chosen to be compatible with fabrication by two-step electron-beam lithography.",

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T1 - Hybrid nanoantennas for directional emission enhancement

AU - Rusak, Evgenia

AU - Staude, Isabelle

AU - Decker, Manuel

AU - Sautter, Jürgen

AU - Miroshnichenko, Andrey E.

AU - Powell, David A.

AU - Neshev, Dragomir N.

AU - Kivshar, Yuri S.

PY - 2014/12/1

Y1 - 2014/12/1

N2 - Plasmonic and dielectric nanoparticles offer complementary strengths regarding their use as optical antenna elements. While plasmonic nanoparticles are well-known to provide strong decay rate enhancement for localized emitters, all-dielectric nanoparticles can enable high directivity combined with low losses. Here, we suggest a hybrid metal-dielectric nanoantenna consisting of a gold nanorod and a silicon nanodisk, which combines all these advantages. Our numerical analysis reveals a giant enhancement of directional emission together with simultaneously high radiation efficiency (exceeding 70%). The suggested hybrid nanoantenna has a subwavelength footprint, and all parameters and materials are chosen to be compatible with fabrication by two-step electron-beam lithography.

AB - Plasmonic and dielectric nanoparticles offer complementary strengths regarding their use as optical antenna elements. While plasmonic nanoparticles are well-known to provide strong decay rate enhancement for localized emitters, all-dielectric nanoparticles can enable high directivity combined with low losses. Here, we suggest a hybrid metal-dielectric nanoantenna consisting of a gold nanorod and a silicon nanodisk, which combines all these advantages. Our numerical analysis reveals a giant enhancement of directional emission together with simultaneously high radiation efficiency (exceeding 70%). The suggested hybrid nanoantenna has a subwavelength footprint, and all parameters and materials are chosen to be compatible with fabrication by two-step electron-beam lithography.

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VL - 105

JO - Applied Physics Letters

JF - Applied Physics Letters

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Hybrid nanoantennas for directional emission enhancement

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