Tunneling properties of electromagnetic wave in slab superconducting material

Abstract

When the electromagnetic wave propagates through a slab superconducting material in microwave ranges, tunneling properties of the electromagnetic wave at critical temperature are investigated theoretically. The transmittance and the reflectance of the slab superconducting material vary with the thickness of material as well as the refractive index of substrates. The high transmittance is found for thin superconductor at low wavelength region. However, optical properties are strongly dependent upon temperature and incidence wavelength. The electromagnetic wave is totally transmitted without loss for incidence wavelength (λ = 5000 nm) due to the zero refractive index and infinite penetration depth of the superconductor at the critical temperature. © 2011 Tianjin University of Technology and Springer-Verlag Berlin Heidelberg.