Blackbody spectrum revisited in the near field

Arthur Babuty (1) , Karl Joulain (2) , Pierre-Olivier Chapuis (3) , Jean-Jacques Greffet (4) , Yannick de Wilde (1)

1 IL - Institut Langevin - Ondes et Images (UMR7587)
2 PPrime [Poitiers] - Institut Pprime [UPR 3346]
3 CETHIL - Centre de Thermique de Lyon
4 Laboratoire Charles Fabry / Naphel

We report local spectra of the near-field thermal emission recorded by a Fourier transform infrared spectrometer, using a tungsten tip as a local scatterer coupling the near-field thermal emission to the far field. Spectra recorded on silicon carbide and silicon dioxide exhibit temporal coherence due to thermally excited surface waves. Finally, we evaluate the ability of this spectroscopy to probe the frequency dependence of the electromagnetic local density of states.

Domains: Optics [physics.optics]

Arthur Babuty, Karl Joulain, Pierre-Olivier Chapuis, Jean-Jacques Greffet, Yannick de Wilde. Blackbody spectrum revisited in the near field. Physical Review Letters, 2013, 110 (14), pp.146103. ⟨10.1103/PhysRevLett.110.146103⟩. ⟨hal-00821535⟩