Low Loss and Magnetic Field-tuned Superconducting THz Metamaterial
physics.optics
/ Authors
Biaobing Jin, Caihong Zhang, Sebastian Engelbrecht, Andrei Pimenov, Jingbo Wu, Qinyin Xu, Chunhai Cao, Jian Chen, Weiwei Xu, Lin Kang
and 1 more author
/ Abstract
Superconducting terahertz (THz) metamaterial (MM) made from superconducting Nb film has been investigated using a continuous-wave THz spectroscopy with a superconducting split-coil magnet. The obtained quality factors of the resonant modes at 132 GHz and 450 GHz are about three times as large as those calculated for a metal THz MM operating at 1 K, which indicates that superconducting THz MM is a very nice candidate to achieve low loss performance. In addition, the magnetic field-tuning on superconducting THz MM is also demonstrated, which offer an alternative tuning method apart from the existed electric, optical and thermal tuning on THz MM.