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Plasmonic Metasurfaces Based on Carbon Nanotube Film for THz Sensing

We present carbon nanotube films metamaterials exhibiting extraordinary transmission at the resonant peaks in the THz wave region. Experiment and theory reveal that the transmission resonant peaks originated from the surface plasmon polaritons resonance, which can be changed through altering the lattice constant of array. The proposed metasurfaces were demonstrated to be efficient in THz sensor for pesticides concentrate.