Ultrafast Tunable Hybrid Yagi-Uda Nanoantenna
Paper in proceeding, 2017
We study radiation from Yagi-Uda nanoantennas composed of metal-dielectric core-shell nanoparticles. We have found an interesting operation regime in such nanoantennas determined by their hybrid nature. This regime rests on the excitation of the Van Hove singularity, supporting high values of directivity and Purcell factor within the same narrow frequency range. In this regime, a strong dynamical tuning of the emission pattern via electron-hole plasma photoexcitation by a femtosecond pumping can be achieved.
Author
Roman S. Savelev
ITMO University
Olga N. Sergaeva
ITMO University
University of Missouri
Denis Baranov
Chalmers, Physics, Bionanophotonics
Alexander E. Krasnok
ITMO University
University of Texas
Andrea Alu
University of Texas
Progress in Electromagnetics Research Symposium
15599450 (ISSN) 19317360 (eISSN)
3854-3858978-1-5090-6269-0 (ISBN)
Progress in Electromagnetics Research Symposium - Spring (PIERS)
St Petersburg, Russia,
St Petersburg, Russia,
Subject Categories (SSIF 2011)
Atom and Molecular Physics and Optics
Fusion, Plasma and Space Physics
Condensed Matter Physics
DOI
10.1109/PIERS.2017.8262431