Speaker
Odeta Limaj
(Department of Physics, University of Rome La Sapienza)
Description
Giliberti, Valeria; Department of Physics, University of Rome La Sapienza, Rome (Italy)
Ortolani, Michele; Department of Physics, University of Rome La Sapienza, Rome (Italy)
Di Gaspare, Alessandra; CNR-Istituto di Fotonica e Nanotecnologie, Rome (Italy)
De Marzi, Gianluca;ENEA:Fusion-Superconductivity, Frascati (Italy)
Lupi, Stefano; Department of Physics, University of Rome La Sapienza, Rome (Italy)
Superconductors are promising candidates for active and tunable metamaterials in the terahertz (THz) range. In this work, we demonstrate the modulation, through temperature, of the intensity, linewidth and frequency of plasmonic features of high temperature superconductors (cuprates and MgB2) based metamaterials. Through a detailed analysis of the parameters characterizing these plasmonic excitations, we also extract some important properties of superconductor compounds, like the penetration depth and the superfluid density. These parameters are usually measured in microwaves using guide propagation and cavity techniques. These techniques, for physical limitations, are hard to extend in the THz range. Using free-space propagation and virtual resonant cavity induced on samples by litographed sub-wavelength resonators, we obtain the temperature dependence of the superfluid density and penetration depth for frequencies up to 3 THz.
Primary author
Odeta Limaj
(Department of Physics, University of Rome La Sapienza)
