Switchable Plasmonic–Dielectric Resonators
with Metal–Insulator Transitions
Nikita
A. Butakov
Ilya Valmianski
Tomer Lewi
Christian Urban
Zhensong Ren
Alexander A. Mikhailovsky
Stephen D. Wilson
Ivan K. Schuller
Jon A. Schuller
10.1021/acsphotonics.7b00334.s001
https://acs.figshare.com/articles/dataset/Switchable_Plasmonic_Dielectric_Resonators_with_Metal_Insulator_Transitions/5588752
Nanophotonic resonators
offer the ability to design nanoscale optical
elements and engineered materials with unconventional properties.
Dielectric-based resonators intrinsically support a complete multipolar
resonant response with low absorption, while metallic resonators provide
extreme light confinement and enhanced photon–electron interactions.
Here, we construct resonators out of a prototypical metal–insulator
transition material, vanadium dioxide (VO<sub>2</sub>), and demonstrate
switching between dielectric and plasmonic resonances. We first characterize
the temperature-dependent infrared optical constants of VO<sub>2</sub> single crystals and thin-films. We then fabricate VO<sub>2</sub> wire arrays and disk arrays. We show that wire resonators support
dielectric resonances at low temperatures, a damped scattering response
at intermediate temperatures, and plasmonic resonances at high temperatures.
In disk resonators, however, upon heating, there is a pronounced enhancement
of scattering at intermediate temperatures and a substantial narrowing
of the phase transition. These findings may lead to the design of
novel nanophotonic devices that incorporate thermally switchable plasmonic–dielectric
behavior.
2017-10-30 00:00:00
novel nanophotonic devices
wire resonators support dielectric resonances
VO 2 wire arrays
plasmonic resonances