Steering of Guided Light with Dielectric Nanoantennas
Ivan Sinev
Filipp Komissarenko
Ivan Iorsh
Dmitry Permyakov
Anton Samusev
Andrey Bogdanov
10.1021/acsphotonics.9b01515.s004
https://acs.figshare.com/articles/media/Steering_of_Guided_Light_with_Dielectric_Nanoantennas/11855652
All-dielectric nanoantennas
proved to be an extremely versatile
tool for efficient light manipulation at the nanoscale. Their rich
functionality and excellent performance arise due to low absorption
and high refractive index of all-dielectric materials, in particular,
silicon, which enables the observation of pronounced magnetic and
electric Mie resonances in subwavelength structures in the visible
and near-infrared ranges. Here, we demonstrate that all-dielectric
spherical nanoantennas placed on a substrate supporting guided modes
provide efficient control over their directivity pattern, achieved
due to the interplay between polarization of the incident light and
the interference of electric and magnetic dipole resonances of the
nanoantenna. In particular, by managing only the wavelength and polarization
state of the incident plane wave at a fixed direction of incidence,
it is possible to implement highly directional full-angle steering
of surface plasmon polariton on a gold film. As a proof of concept,
we experimentally demonstrate plasmonic beam steering with a single
silicon nanoantenna using circular polarization of light. Our approach
offers unprecedented versatility for designing nanoscale antennas
with applications in integrated nanophotonics and quantum optics.
2020-02-14 15:13:19
quantum optics
surface plasmon polariton
Dielectric Nanoantennas All-dielectric nanoantennas
incident light
gold film
plasmonic beam steering
Guided Light
full-angle steering
light manipulation
directivity pattern
near-infrared ranges
nanoscale antennas
incident plane wave
all-dielectric materials
polarization state
silicon nanoantenna
Mie resonances
subwavelength structures