Open AccessBroadband metacoaxial nanoantenna for metasurface and sensing applications
Author(s) -
Alexei Smolyaninov,
Lin Pang,
Lindsay Freeman,
Maxim Abashin,
Yeshaiahu Fainman
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.022786
Subject(s) - broadband , optics , polarization (electrochemistry) , bandwidth (computing) , materials science , optoelectronics , plasmon , near and far field , visible spectrum , physics , computer science , telecommunications , chemistry
We introduce a metacoaxial nanoantenna (MN) that super-localizes the incident electromagnetic field to "hotspots" with a top-down area of 2 nm(2), a local field enhancement of ~200-400, and a field localization with a very large spectral range from the visible to the infrared range that has a spectral bandwidth ≥ 900 nm. Not only is this nanoantenna extremely broadband with ultra-high localization, it also shows significant improvements over traditional nanoantenna designs, as the hotspots are re-configurable by breaking the circular symmetry which enables the ability to tailor the polarization response. These attributes offer significant improvements over traditional nanoantennas as building blocks for metasurfaces and enhanced biodetection that we demonstrate in this work.