Radiative heat transfer between metallic nanoparticles

Pierre-Olivier Chapuis (1, 2) , Marine Laroche (1) , Sebastian Volz (1) , Jean-Jacques Greffet (1)

1 EM2C - Laboratoire d'Énergétique Moléculaire et Macroscopique, Combustion
2 INSP - Institut des Nanosciences de Paris

In this letter, we study the radiative heat transfer between two nanoparticles in the near field and in the far field. We find that the heat transfer is dominated by the electric dipole-dipole interaction for dielectric particles and by the magnetic dipole-dipole interaction for metallic nanoparticles. We introduce polarizabilities formulas valid for arbitrary values of the skin depth. While the heat transfer mechanism is different for metallic and dielectric nanoparticles, we show that the distance dependence is the same. However, the dependence of the heat flux on the particle radius is different.

Mots clés: Nanoparticles; Radiative heat transfer; Near field; Polarizabilities; Skin depth; Magnetic dipole

Domaines: Optique / photonique; Optique [physics.optics]; Agrégats Moléculaires et Atomiques [physics.atm-clus]; Thermique [physics.class-ph]; Thermique [physics.class-ph]; Electromagnétisme; Micro et nanotechnologies/Microélectronique

Pierre-Olivier Chapuis, Marine Laroche, Sebastian Volz, Jean-Jacques Greffet. Radiative heat transfer between metallic nanoparticles. Applied Physics Letters, 2008, 92 (20), pp.201906. ⟨10.1063/1.2931062⟩. ⟨hal-00260300⟩