S. Atakaramians, I. Shadrivov, A. Miroshnichenko, A. Stefani, H. Ebendorff‐Heidepriem, T. Monro, S. V.
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We experimentally demonstrate that an enhanced THz magnetic source can be achieved by placing a subwavelength fiber in front of a sub-wavelength aperture illuminated by a THz plane wave. This hybrid system can be considered as a unit cell of metasurfaces for THz wave manipulation and can also be scaled to optical frequencies opening up avenues for developing fiber based optical devices such as nanoantenna and laser.