Yanhan Zhu, Subash Vegesna, Yong Zhao, Vladimir Kuryatkov, Mark Holtz, Zhaoyang Fan, Mohammad Saed, and Ayrton A. Bernussi
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.
© 2013 Optical Society of America
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