|
Résumé |
Terahertz (THz) spectroscopy offers unique access to the key properties of superconductors, such as the superconducting gap, penetration depth, quasiparticle behavior, vortex dynamics, and non-equilibrium relaxation. I will illustrate the advantages and limitations of this approach through our previous work on high-quality thin NbN films showcasing measurements from zero field up to 7 Tesla in both Faraday and Voigt geometries [1]. This research is primarily aimed to critically test models based on BCS theory and to understand the complex behavior of vortices under various conditions.
[1] Šindler, M., Herman, F., Kadlec, F., & Kadlec, C. (2025). Deeper insight into the terahertz response of conventional superconductors under magnetic field. Physical Review B, 112(9), 094512.
[2] Kadlec, C., Kadlec, F., & Šindler, M. (2022, August). Superconductor-insulator transition in a NbN film under in-plane magnetic field. In 2022 Millimeter and Terahertz Waves (IRMMW-THz) (pp. 1-2). IEEE. |
