Dielectric Yagi-Uda nanoantennas driven by electron-hole plasma photoexcitation
Paper i proceeding, 2017

All-dielectric nanophotonics based on high-index dielectric nanoparticles became a powerful platform for modern light science, providing many fascinating applications, including high-efficient nanoantennas and metamaterials. High-index dielectric nanostructures are of a special interest for nonlinear nanophotonics, where they demonstrate special types of optical nonlinearity, such as electron-hole plasma photoexcitation, which are not inherent to plasmonic nanostructures. Here, we propose a novel type of highly tunable all-dielectric Yagi-Uda nanoantennas, consisting of a chain of Si nanoparticles exciting by an electric dipole source, which allow tuning of their radiating properties via electron-hole plasma photoexcitation. We theoretically and numerically demonstrate the tuning of radiation power patterns and the Purcell effect by additional pumping of several boundary nanoparticles with relatively low peak intensities of fs-laser.

Författare

S. Li

Saint Petersburg National Research University of Information Technologies, Mechanics and Optics University ITMO

S. I. Lepeshov

Saint Petersburg National Research University of Information Technologies, Mechanics and Optics University ITMO

R.S. Savelev

Saint Petersburg National Research University of Information Technologies, Mechanics and Optics University ITMO

Denis Baranov

Chalmers, Fysik

P. Belov

Saint Petersburg National Research University of Information Technologies, Mechanics and Optics University ITMO

A. E. Krasnok

University of Texas at Austin

Journal of Physics: Conference Series

1742-6588 (ISSN)

Vol. 917 062054

Ämneskategorier

Fysik

DOI

10.1088/1742-6596/917/6/062054