Ultrafast Tunable Hybrid Yagi-Uda Nanoantenna
Paper i 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.
Författare
Roman S. Savelev
ITMO University
Olga N. Sergaeva
University of Missouri
ITMO University
Denis Baranov
Chalmers, Fysik, Bionanofotonik
Alexander E. Krasnok
ITMO University
The University of Texas at Austin
Andrea Alu
The University of Texas at Austin
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,
Ämneskategorier
Atom- och molekylfysik och optik
Fusion, plasma och rymdfysik
Den kondenserade materiens fysik
DOI
10.1109/PIERS.2017.8262431