Shape-dependence of near-field heat transfer between a spheroidal nanoparticle and a flat surface

O. Huth , F. Rüting , Svend-Age Biehs , M. Holthaus

We study the radiative heat transfer between a spheroidal metallic nanoparticle and a planar metallic sample for near- and far-field distances. In particular, we investigate the shape dependence of the heat transfer in the near-field regime. In comparison with spherical particles, the heat transfer typically varies by factors between 1/2 and 2 when the particle is deformed such that its volume is kept constant. These estimates help to quantify the deviation of the actual heat transfer recorded by a near-field scanning thermal microscope from the value provided by a dipole model which assumes a perfectly spherical sensor.

Mots clés: Physical Sciences

O. Huth, F. Rüting, Svend-Age Biehs, M. Holthaus. Shape-dependence of near-field heat transfer between a spheroidal nanoparticle and a flat surface. European Physical Journal: Applied Physics, 2010, 50 (1), pp.10603. ⟨10.1051/epjap/2010027⟩. ⟨hal-00581876⟩