In this Letter, plasmonic sectoral horn nanoantennas working at near-infrared wavelength (1550 nm) have been investigated. We demonstrate that, although there are certain differences between the plasmonic and classical radiofrequency (RF) sectoral horn antennas, the plasmonic horns still possess a number of attractive features, like their RF counterparts, such as tunable high directivities, simplicity in fabrication, and ease of coupling to waveguides. As a specific application, we further show how to exploit these findings to optimize an optical wireless nanolink using the proposed horn nanoantennas, and obtain a 60-fold increase in the received power compared with the situation of matched dipole nanoantennas.
© 2014 Optical Society of America
Original Manuscript: March 25, 2014
Revised Manuscript: April 22, 2014
Manuscript Accepted: April 22, 2014
Published: May 23, 2014
Yuanqing Yang, Ding Zhao, Hanmo Gong, Qiang Li, and Min Qiu, "Plasmonic sectoral horn nanoantennas," Opt. Lett. 39, 3204-3207 (2014)