Thermal bistability through coupled photonic resonances

Abstract

We present a scheme for achieving thermal bistability based on the selective coupling of three optical resonances. This approach requires one of the resonant frequencies to be temperature dependent, which can occur in materials exhibiting strong thermo-optic effects. For illustration, we explore thermal bistability in two different passive systems, involving either a periodic array of Si ring resonators or parallel GaAs thin films separated by vacuum and exchanging heat in the near field. Such a scheme could prove useful for thermal memory devices operating with transition times $\lesssim$ hundreds of milliseconds.

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• Designing nonlinear thermal devices and metamaterials under the Fourier's law: A route to nonlinear thermotics
• Scalable radiative thermal logic gates based on nanoparticle networks
• Radiative thermal rectification in many-body systems
• Smart thermal management with near-field thermal radiation
• Thermo-optic hysteresis with bound states in the continuum
• Temporal coupled mode theory for high-$Q$ resonances in dielectric metasurfaces