TY  - JOUR
AB  - © 2018 American Physical Society. 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 (?0/10) takes advantage of combinations of positive and negative permittivity materials in the optical regime.
AU  - Arslanagi?, S
AU  - Ziolkowski, RW
DA  - 2018/06/06
DO  - 10.1103/PhysRevLett.120.237401
JO  - Physical Review Letters
PY  - 2018/06/06
TI  - Highly Subwavelength, Superdirective Cylindrical Nanoantenna
VL  - 120
Y1  - 2018/06/06
Y2  - 2026/05/21
ER  -