Near-field radiative heat transfer enhancement using natural hyperbolic material. (January 2019)

• Record Type: Journal Article
• Authors: Salihoglu, Hakan; Xu, Xianfan
• Is Part Of: Journal of quantitative spectroscopy & radiative transfer. Volume 222/223(2019)
• Page Start: 115
• Page End: 121
• Publication Date: 2019-01
• Subjects: Near-field radiative transfer -- Hyperbolic modes -- Surface phonon polaritons; Spectrum analysis -- Periodicals; Radiation -- Periodicals; Analyse spectrale -- Périodiques; Rayonnement -- Périodiques; Radiation; Spectrum analysis; Periodicals; 543.0858
• DOI: 10.1016/j.jqsrt.2018.10.022
• Languages: English
• ISSNs: 0022-4073

Abstract

Highlights: Enhancement of near-field radiation in hyperbolic materials is due to high-κ modes within the hyperbolic bands. Natural hyperbolic materials are good candidates for near-field radiation enhancement. Near-field radiation from hyperbolic materials can be comparable to that from polar materials. Abstract: Hyperbolic materials have been newly discovered that can enhance near-field radiative transfer. Multilayer and three-dimensional hyperbolic materials require challenging fabrication techniques. From a practical point of view, natural hyperbolic materials serve better in applications requiring near-field radiative transfer enhancement. In this study, we investigate enhancement of near-field radiative transfer using natural hyperbolic material – calcite, and compare with that from (also natural) polar dielectric materials, SiC, where phonon polaritons are responsible for enhanced near-field heat transfer. Spectral analyses of enhanced near-field radiative transfer from hyperbolic modes in hyperbolic materials and surface phonon polaritons in polar dielectric materials are carried out and compared, which determine the origin and amount of near-field radiative transfer enhancement in these materials.