Infrared antenna array based on nano-holes in ultrathin metallic films
National Laboratory of Solid State Microstructures and Department of
Physics, Nanjing University, Nanjing, 210093, P.R. China
Corresponding author: firstname.lastname@example.org
Accepted: 9 June 2010
Published online: 2 August 2010
In this work, we investigate the emission of the nano-hole array in an ultrathin silver film at infrared regime. It is shown that when the incident light illuminates the nano-hole array, the localized surface plasmons are excited and serve as electric dipoles. The emission of the nano-hole array presents a strong directivity. The maximum radiation is located at infrared regime, and it can be tuned by the period of the nano-hole array, the incidence angle and the polarization of the excitation light. These findings extend our understandings of optical property of metallic nano-structures and provide a unique way to achieve infrared antenna arrays, which may achieve potential applications in photovoltaics and telecommunication.
© EDP Sciences, 2010