PHYSICAL REVIEW B 95, 125411 (2017)

Radiative heat transfer in many-body systems:
Coupled electric and magnetic dipole approach

Jian Dong^a, Junming. Zhao^a*, LinhuaLiu^{a, b†}[1]

^aSchool of Energy Science andEngineering, Harbin Institute of Technology, Harbin 150001, China
^b Department of Physics, Harbin Institute of Technology,Harbin 150001, China

ABSTRACT

The many-body radiative heat transfer theory [P. Ben-Abdallah,S.-A. Biehs, and K. Joulain, Phys. Rev. Lett. 107, 114301 (2011)] only considered thecontribution from the electric dipole moment. For metal particles, however, themagnetic dipole moment due to eddy current plays an important role, which canfurther couple with the electric dipole moment to introduce crossed terms. Inthis work, we develop coupled electric and magnetic dipole (CEMD) approach forthe radiative heat transfer in a collection of objects in mutual interaction. Dueto the coupled electric and magnetic interactions, four terms, namely the electric-electric,the electric-magnetic, the magnetic-electric and the magnetic-magnetic terms,contribute to the radiative heat flux and the local energy density. The CEMD isapplied to study the radiative heat transfer between various dimers of nanoparticles.It is found that each of the four terms can dominate the radiative heattransfer depending on the position and composition of particles. Moreover,near-field many-body interactions are studied by CEMD considering bothdielectric and metallic nanoparticles. The near-field radiative heat flux andlocal energy density can be greatly increased when the particles are in coupledresonances. Surface plasmon polariton and surface phonon polariton can becoupled to enhance the radiative heat flux.

^*jmzhao@hit.edu.cn (Junming Zhao)
^†lhliu@hit.edu.cn (Linhua Liu)

Keywords: Near field radiative heat transfer, many body heat transfer, metallic nanoparticle

Paper link: https://journals.aps.org/prb/pdf/10.1103/PhysRevB.95.125411

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