-A A +A
Type: 
Journal
Description: 
Aluminum bowtie nanoantennas represent a possibility to confine and enhance electromagnetic (EM) field at optical frequencies in subwavelength regions by using an abundant and inexpensive metal. The native oxidation process of this metal is often viewed as a limitation for its application in plasmonics. Here, we show that in close gap configurations, the high refractive index of the native aluminum oxide helps in squeezing the plasmonic mode in extremely reduced size volumes, providing a higher EM near-field confinement and enhancement in the bowtie antenna gaps than achieved in the pure aluminum counterpart.
Publisher: 
IOP Publishing
Publication date: 
20 Oct 2020
Authors: 

Daniela Simeone, Vittorianna Tasco, Marco Esposito, Mariachiara Manoccio, Daniela Lorenzo, Mario Scuderi, Antonio De Luca, Stefano Cabrini, Adriana Passaseo, Massimo Cuscunà

Biblio References: 
Volume: 32 Issue: 2 Pages: 025305
Origin: 
Nanotechnology