TY - JOUR
T1 - Highly Subwavelength, Superdirective Cylindrical Nanoantenna
AU - Arslanagić, Samel
AU - Ziolkowski, Richard W.
N1 - Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/6/6
Y1 - 2018/6/6
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.120.237401
DO - 10.1103/PhysRevLett.120.237401
M3 - Article
C2 - 29932717
AN - SCOPUS:85048313731
SN - 0031-9007
VL - 120
JO - Physical review letters
JF - Physical review letters
IS - 23
M1 - 237401
ER -