Overcoming limits to near-field radiative heat transfer in uniform planar media through multilayer optimization

Weiliang Jin, Riccardo Messina, Alejandro W. Rodriguez

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

Radiative heat transfer between uniform plates is bounded by the narrow range and limited contribution of surface waves. Using a combination of analytical calculations and numerical gradient-based optimization, we show that such a limitation can be overcome in complicated multilayer geometries, allowing the scattering and coupling rates of slab resonances to be altered over a broad range of evanescent wavevectors. We conclude that while the radiative flux between two inhomogeneous slabs can only be weakly enhanced, the flux between a dipolar particle and an inhomogeneous slab-proportional to the local density of states-can be orders of magnitude larger, albeit at the expense of increased frequency selectivity. A brief discussion of hyperbolic metamaterials shows that they provide far less enhancement than optimized inhomogeneous slabs.

Original languageEnglish (US)
Pages (from-to)14746-14759
Number of pages14
JournalOptics Express
Volume25
Issue number13
DOIs
StatePublished - Jun 26 2017

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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