Title :
Tunable plasmonic Yagi-Uda nanoantenna
Author :
Maksymov, Ivan S. ; Miroshnichenko, Andrey E. ; Kivshar, Yuri S.
Author_Institution :
Nonlinear Phys. Centre, Australian Nat. Univ., Canberra, ACT, Australia
Abstract :
We suggest and theoretically study a novel tunable plasmonic Yagi-Uda nanoantenna driven by means of a feed element consisting of two closely spaced metal nanobars separated by a gap filled with a semiconductor. Through extensive numerical simulations we demonstrate that a variation of the free-carrier density in the semiconductor strongly modifies the antenna´s response in both near-field and far-field regions, which opens up ways for active all-optical spectral tuning of the nanoantenna.
Keywords :
Yagi antenna arrays; carrier density; nanophotonics; numerical analysis; optical tuning; all-optical spectral tuning; feed element; free-carrier density; metal nanobars; numerical simulations; semiconductor; tunable plasmonic Yagi-Uda nanoantenna; Feeds; Nonlinear optics; Optical pumping; Optical sensors; Plasmons; Yagi-Uda antennas;
Conference_Titel :
Nonlinear Photonics (NLP), 2011 International Workshop
Conference_Location :
Kharkov
Print_ISBN :
978-1-4577-0477-2
DOI :
10.1109/NLP.2011.6102668
