Exponential suppression of thermal conductance using coherent transport and heterostructures

TL;DR

This paper demonstrates that coherent thermal conductance in multilayer photonic crystal heterostructures can be exponentially suppressed by cascading non-identical crystals, leveraging band mismatch effects.

Contribution

It introduces a method to exponentially reduce thermal conductance using heterostructures of photonic crystals with mismatched bands.

Findings

Thermal conductance decreases exponentially with the number of cascaded crystals.

Band mismatch between photonic crystals causes suppression of thermal transport.

The approach offers a new way to control heat flow in photonic devices.

Abstract

We consider coherent thermal conductance through multilayer photonic crystal heterostructures, consisting of a series of cascaded non-identical photonic crystals. We show that thermal conductance can be suppressed exponentially with the number of cascaded crystals, due to the mismatch between photonic bands of all crystals in the heterostructure.