Issue 3, 2023

Spectrally stable thermal emitters enabled by material-based high-impedance surfaces

Abstract

Radiative thermal engineering with subwavelength metallic bodies is a key element for heat and energy management applications, communication and sensing. Here, we numerically and experimentally demonstrate metallic thermal emitters with narrowband but extremely stable emission spectra, whose resonant frequency does not shift with changes on the nanofilm thickness, the angle of observation and/or polarization. Our devices are based on epsilon-near-zero (ENZ) substrates acting as material-based high-impedance substrates. They do not require from complex nanofabrication processes, thus being compatible with large-area and low-cost applications.

Graphical abstract: Spectrally stable thermal emitters enabled by material-based high-impedance surfaces

Supplementary files

Article information

Article type
Paper
Submitted
16 sep 2022
Accepted
17 nov 2022
First published
28 nov 2022
This article is Open Access
Creative Commons BY license

Nanoscale Adv., 2023,5, 650-658

Spectrally stable thermal emitters enabled by material-based high-impedance surfaces

D. Navajas, J. M. Pérez-Escudero and I. Liberal, Nanoscale Adv., 2023, 5, 650 DOI: 10.1039/D2NA00633B

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