# Enhancing Near-Field Radiative Heat Transfer with Si-based Metasurfaces

## TL;DR

This paper demonstrates that Si-based metasurfaces with periodic holes can significantly enhance near-field radiative heat transfer by tuning surface plasmon polaritons, surpassing unstructured materials at room temperature.

## Contribution

It introduces a novel approach using metasurfaces to control and boost near-field radiative heat transfer, with detailed analysis and predictions for Si-based structures.

## Key findings

- Significant enhancement of heat conductance with metasurfaces.
- Tuning surface plasmon polaritons controls heat transfer.
- Potential for applications in thermal management.

## Abstract

We demonstrate in this work that the use of metasurfaces provides a viable strategy to largely tune and enhance near-field radiative heat transfer between extended structures. In particular, using a rigorous coupled wave analysis, we predict that Si-based metasurfaces featuring two-dimensional periodic arrays of holes can exhibit a room-temperature near-field radiative heat conductance much larger than any unstructured material to date. We show that this enhancement, which takes place in a broad range of separations, relies on the possibility to largely tune the properties of the surface plasmon polaritons that dominate the radiative heat transfer in the near-field regime.