Terahertz superconducting plasmonic hole array.
We demonstrate a superconductor array of subwavelength holes with active thermal control over the resonant transmission induced by surface plasmon polaritons. The array was lithographically fabricated on a high-temperature yttrium barium copper oxide superconductor and characterized by terahertz time-domain spectroscopy. We observe a clear transition from a virtual excitation of the surface plasmon mode to a real surface plasmon mode. The highly controllable superconducting plasmonic crystals may find promising applications in the design of low-loss, large- dynamic-range amplitude modulation and surface-plasmon-based terahertz devices.
Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Tianjin University, China.
Zhen
Z
Tian
Ranjan
R
Singh
Jiaguang
J
Han
Jianqiang
J
Gu
Qirong
Q
Xing
Judy
J
Wu
Weili
W
Zhang