title: Radiative heat transfer as a Landauer-Büttiker problem.
abstract: We study the radiative heat transfer between two semi-infinite half-spaces, bounded by conductive surfaces in contact with vacuum. This setup is interpreted as a four-terminal mesoscopic transport problem. The slabs and interfaces are viewed as bosonic reservoirs, coupled perfectly to a scattering center consisting of the two planes and vacuum. Using Rytov's fluctuational electrodynamics and assuming Kirchhoff's circuital law, we calculate the heat flow in each bath. This allows for explicit evaluation of a conductance matrix, from which one readily verifies Büttiker symmetry. Thus, radiative heat transfer in layered media with conductive interfaces becomes a Landauer-Büttiker transport problem.
authors.affiliation: NUS Graduate School for Integrative Sciences and Engineering, Singapore 117597, Republic of Singapore.
authors.forename: Han Hoe
authors.initials: HH
authors.lastname: Yap
authors.affiliation: Department of Physics, National University of Singapore, Singapore 117551, Republic of Singapore.
authors.forename: Jian-Sheng
authors.initials: JS
authors.lastname: Wang