Highly Subwavelength, Superdirective Cylindrical Nanoantenna

Samel Arslanagic; Richard W. Ziolkowski

doi:10.1103/PhysRevLett.120.237401

Highly Subwavelength, Superdirective Cylindrical Nanoantenna

Samel Arslanagic, Richard W. Ziolkowski

University of Technology Sydney

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Abstract

A superdirective cylindrical nanoantenna is demonstrated with a multilayered cylindrical metamaterial-inspired structure. Targeting specific scattering coefficients for the dipole and higher-order modes, the ideal limit of needle radiation is demonstrated. A five-layer system is optimized to demonstrate its approach to the theoretical directivity bound. While the resulting structure is scalable to any frequency regime, its highly subwavelength overall size (Î»0/10) takes advantage of combinations of positive and negative permittivity materials in the optical regime.

Original language	English
Journal	Physical Review Letters
Volume	120
Issue number	23
Pages (from-to)	237401
Number of pages	1
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.120.237401
Publication status	Published - 2018

Bibliographical note

© 2018 American Physical Society. High Energy Physics (HEP) papers published after January 1, 2018 in Physical Review Letters, Physical Review C, and Physical Review D are published open access, paid for centrally by SCOAP3. Library subscriptions will be modified accordingly. This arrangement will initially last for two years, up to the end of 2019.

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Highly Subwavelength, Superdirective Cylindrical Nanoantenna

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