Near-field radiative heat transfer between two one-dimensional rough surfaces

Based on electromagnetic field theory and the fluctuation dissipation theory, near-field radiative heat transfer between two rough surfaces of Cu were numerically analyzed, by means of finite difference time domain (FDTD) method. The effects of the spacing between two rough surfaces and roughness were discussed. The results show that radiation intensity increases with the spacing decrease. Roughness and dielectric constant of the medium are also the important factors, which affect the near-field radiation intensity.