2008/02/13 by Pierre‐Olivier Chapuis, Pierre-Olivier Chapuis, Marine Laroche +4 · 4 citations
Engineering · Materials Science · Physics and Astronomy · #Metamaterials and Metasurfaces Applications #Quantum Electrodynamics and Casimir Effect #Thermal Radiation and Cooling Technologies #cond-mat.other
paper · pdf · doi:10.1103/physrevb.77.125402
published as Physical Review B 77, 12 (2008) 125402 · publié dans Physical Review B 77 (2008), version avant review
arxiv created 2008/02/13 · openalex publication_date 2008/03/06 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We revisit the electromagnetic heat transfer between a metallic nanoparticle and a highly conductive metallic semi-infinite substrate, commonly studied using the electric dipole approximation. For infrared and microwave frequencies, we find that the magnetic polarizability of the particle is larger than the electric one. We also find that the local density of states in the near field is dominated by the magnetic contribution. As a consequence, the power absorbed by the particle in the near field is due to dissipation by fluctuating eddy currents. These results show that a number of near-field effects involving metallic particles should be affected by the fluctuating magnetic fields.