Anisotropic behaviour of transmission through thin superconducting NbN film in parallel magnetic field

• Published in: Physica. C, Superconductivity Vol. 533; pp. 154 - 157
• Main Authors: Šindler, M., Tesař, R., Koláček, J., Skrbek, L.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15-02-2017; Elsevier BV
• Subjects: Beams (radiation); Far-infrared transmission; Magnetic fields; NbN; Parallel magnetic field; Sapphire; Superconducting film; Superconductivity; Superconductors; Temperature; Terahertz frequencies; Terahertz waves; Thin films; Vortices; Parallel magnetic field; NbN; Superconducting film; Vortices; Far-infrared transmission; Terahertz waves
• ISSN: 0921-4534; 1873-2143
• DOI: 10.1016/j.physc.2016.02.013

•Transmission through thin NbN film in parallel magnetic field exhibits strong anisotropic behaviour in the terahertz range.•Response for a polarisation parallel with the applied field is given as weighted sum of superconducting and normal state contributions.•Effective medium approach fails to describe response for linear polarisation perpendicular to the applied magnetic field.
Transmission of terahertz waves through a thin layer of the superconductor NbN deposited on an anisotropic R-cut sapphire substrate is studied as a function of temperature in a magnetic field oriented parallel with the sample. A significant difference is found between transmitted intensities of beams linearly polarised parallel with and perpendicular to the direction of applied magnetic field.