Enhancing outcoupling of near-field radiative heat transfer via magnetic dipole resonance
Journal
Materials Today Physics
Journal Volume
60
Start Page
101990
ISSN
25425293
Date Issued
2026-01
Author(s)
Abstract
The near-field radiative heat transfer (NFRHT) between materials is crucial in near-field applications. In this study, near-field thermal radiation was generated by the interaction of surface phonon polaritons (SPhPs) with magnetic dipole resonances. The results revealed that the emission enhancement far exceeded the levels expected from a low coverage of Si particles. Moreover, adjusting the particle size enhanced the emission of different polar materials. The experimental results revealed that only 1.7 % Si-particle surface coverage could enhance the average emissivity of SiC within the Reststrahlen band by 2.47 times. The simulation and experimental results indicate that Si particles could successfully outcouple energy with the SPhPs of polar materials in the near-field range, and then scatter electromagnetic energy to the far field. This study demonstrated that spin coating with Si particles is a simple, low-cost, and nondestructive method for effectively increasing surface emission. This Si-based thermal radiant antenna holds strong potential for application to far-field emissions of near-field energy from polar materials.
Subjects
Magnetic dipole resonance
Near-field thermal radiation
Polar materials
Surface phonon polaritons
Thermal radiant antenna
Publisher
Elsevier Ltd
Type
journal article