A reflective mm-wave photonic limiter
Rodion Kononchuk, Suwun Suwunnarat, Martin S. Hilario, Anthony E., Baros, Brad W. Hoff, Vladimir Vasilyev, Ilya Vitebskiy, Tsampikos Kottos,, Andrey A. Chabanov

TL;DR
This paper introduces a reflective mm-wave photonic limiter using a multilayer VO2 structure that switches from transparent to reflective at high power levels, protecting sensitive receivers from damage.
Contribution
It demonstrates a novel, power-controlled, reflective mm-wave limiter based on VO2's phase transition, combining experimental and numerical analysis.
Findings
The limiter effectively reflects high-power signals without damage.
It maintains a nearly constant output above the threshold.
The device operates based on a thermally induced phase change in VO2.
Abstract
Millimeter wave (mm-wave) communications and radar receivers capable of processing small signals must be protected from high-power signals, which can damage sensitive receiver components. Many of these systems arguably can be protected by using photonic limiting techniques, in addition to electronic limiting circuits in receiver front-ends. Here we demonstrate, experimentally and numerically, a free-space, reflective mm-wave limiter based on a multilayer structure involving a nanolayer of vanadium dioxide (VO2), experiencing a thermal insulator-to-metal transition. The multilayer acts as a variable reflector, controlled by the input power. At low input power levels, VO2 remains dielectric, and the multilayer exhibits resonant transmittance. When the input power exceeds a threshold level, the emerging metallic phase renders the multilayer highly reflective while dissipating a small…
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Taxonomy
TopicsOptical Network Technologies · Photonic and Optical Devices · Advanced Photonic Communication Systems
