Abstract

Radiative thermal rectifiers capable of realizing asymmetric heat flux transfer have attracted a lot of research interests recently, mainly focusing on the engineering of the emissivity spectra. In this Letter, we propose a far-field radiative thermal rectifier utilizing the phase change material vanadium dioxide (${\mathrm{VO}}_2$). The thermal rectifier consists of a metamaterial infrared absorber and a two-layer thin-film structure acting as the active and the passive components, respectively. Numerical optimization has been carried out to control the emissivity spectra of both parts and maximize the overall rectification effect. A large thermal rectification factor of 3.5 is predicted at a temperature bias of $\mathrm{\Delta }\mathrm{T}=100\mathrm{K}$.

© 2018 Optical Society of America

Dirac semimetal-assisted near-field radiative thermal rectifier and thermostat based on phase transition of vanadium dioxide

Shuang Wen, Yuhang Zhang, Yicheng Ma, and Zhiqiang Sun
Opt. Express 31(21) 34362-34380 (2023)

Simple far-field radiative thermal rectifier using Fabry–Perot cavities based infrared selective emitters

E. Nefzaoui, J. Drevillon, Y. Ezzahri, and K. Joulain
Appl. Opt. 53(16) 3479-3485 (2014)

GST-VO₂-based near-field multistage radiative thermal rectifier

Yang Liu, Andrew Caratenuto, and Yi Zheng
Opt. Mater. Express 12(6) 2135-2144 (2022)

Photonic thermal switch via metamaterials made of vanadium dioxide-coated nanoparticles

Mingjian He, Xue Guo, Hong Qi, Lu Lu, and Heping Tan
Opt. Lett. 48(21) 5731-5734 (2023)

Vanadium-dioxide microstructures with designable temperature-dependent thermal emission

Romil Audhkhasi and Michelle L. Povinelli
Opt. Lett. 46(7) 1768-1771 (2021)