Tunable dual-band terahertz metamaterial bandpass filters.
We report metamaterial terahertz (THz) bandpass filters with tunable dual-band selectivity. The shift in the center frequency of the device is achieved by actively modifying the effective length of the resonators. This was realized by introducing vanadium dioxide (VO2) bridges interconnecting specific regions of each resonator. Raising the temperature across the phase transition shifted the resonance frequency by ~32% due to changes in the electrical conductivity of the VO2. Measured THz transmission response of the proposed dual-band filter was in good correspondence with simulations.
Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, Texas 79409, USA.
Yanhan
Y
Zhu
Subash
S
Vegesna
Yong
Y
Zhao
Vladimir
V
Kuryatkov
Mark
M
Holtz
Zhaoyang
Z
Fan
Mohammad
M
Saed
Ayrton A
AA
Bernussi