Author(s): Fang, JM (Fang, Jimin); Zou, JQ (Zou, Jiaqi); Liu, TY (Liu, Tingyu); Wang, MZ (Wang, Manzhuo); Sun, XQ (Sun, Xiaoqiang); Wu, YD (Wu, Yuanda); Zhang, DM (Zhang, Daming)

Source: APPLIED PHYSICS LETTERS Volume: 124 Issue: 17  Article Number: 171702  DOI: 10.1063/5.0180575  Published Date: 2024 APR 22 

Abstract: The development of dual-polarization irreversible radiators that can operate without external magnetic field is an arduous task. To avoid the need of strong magnetic field, a dual-polarization nonreciprocal thermal radiator with the introduction of Weyl semimetal is demonstrated. It consists of cross-shaped silicon nanopores, Weyl semimetal, and Ag reflective layer. The simulation results show that the proposed radiator offers both TE- and TM-polarized strong irreversible radiation with an incident angle of 1.6 degrees. The TE-polarized absorptivity and TM-polarized emissivity are 98.8% and 97.6%, respectively. The dual-polarization nonreciprocity exceeds 80%. The physical principle is explained by the electric field energy distribution and impedance matching theory. The demonstrated scheme and radiator have potential application in dual-polarization multi-band irreversible radiation and thermal management.

Accession Number: WOS:001206587800009

ISSN: 0003-6951

eISSN: 1077-3118