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Tunable terahertz transmission properties of aligned Ni-nanowire arrays.

Optics Express 2017 November 28
Aligned Ni nanowire (NW) arrays were investigated for terahertz (THz) wave modulation. By adjusting the NW density and order of the NW arrays, the resonant frequency and intensity of the THz waves can be effectively tuned. The tuning range of the resonant frequency is about 0.29 THz, and a transmittance of less than 40% in the frequency region from 0.5 to 2 THz is achieved by changing the NW density. Although the order of the NW arrays has no influence on the resonant frequency, the transmittance can be tuned about 21%. The ability to tune the intensity and resonant frequency effectively and the ease of fabrication of the Ni-NW arrays make them the potential candidates for THz tunable filters, intensity modulators, and spatial light modulators.

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