Spectrally enhancing near-field radiative heat transfer by exciting magnetic polariton in SiC gratings
arXiv:1501.05281 · doi:10.1016/j.ijheatmasstransfer.2016.12.061
Abstract
In the present work, we theoretically demonstrate, for the first time, that near field radiative transport between 1D periodic grating microstructures separated by subwavelength vacuum gaps can be significantly enhanced by exciting magnetic resonance or polariton. Fluctuational electrodynamics that incorporates scattering matrix theory with rigorous coupled wave analysis is employed to exactly calculate the near field radiative heat flux between two SiC gratings. Besides the well known coupled surface phonon polaritons (SPhP), an additional spectral radiative heat flux peak, which is due to magnetic polariton, is found within the phonon absorption band of SiC. The mechanisms, behaviors and interplays between magnetic polariton, coupled SPhP, single interface SPhP, and Wood's anomaly in the near field radiative transport are elucidated in detail. The findings will open up a new way to control near field radiative heat transfer by magnetic resonance with micro or nanostructured metamaterials.
11 pages, 4 figures
References in corpus (9)
- Near-field thermal transistor
- Broadband super-Planckian thermal emission from hyperbolic metamaterials
- Near-field radiative heat transfer between nanostructures in the deep sub-wavelength regime
- Radiative bistability and thermal memory
- Casimir interaction of dielectric gratings
- Spectrally enhancing near-field radiative transfer between gold gratings by exciting magnetic polariton in nanometric vacuum gaps
- Vacuum Thermal Switch Made of Phase Transition Materials Considering Thin Film and Substrate Effects
- Wavelength-Tunable Infrared Metamaterial by Tailoring Magnetic Resonance Condition with VO2 Phase Transition
- Infrared Frequency-Tunable Coherent Thermal Sources