Highly Subwavelength, Superdirective Cylindrical Nanoantenna

Samel Arslanagić, Richard W. Ziolkowski

Research output: Contribution to journalArticle

15 Scopus citations

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 (λ0/10) takes advantage of combinations of positive and negative permittivity materials in the optical regime.

Original languageEnglish (US)
Article number237401
JournalPhysical review letters
Volume120
Issue number23
DOIs
StatePublished - Jun 6 2018

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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