The resolutions of reported THz imaging techniques are limited to millimeter range, owing to a consequence of the evanescent decay of high spatial frequencies. Realizing super-resolution imaging in the THz frequency range has advantages on applications such as biomedical sensing and nondestructive testing, where the internal images of targets can be glimpsed arising from the penetrability of THz waves. In this talk, the systematic research progress on this topic made by our team is reported. To beat the diffraction limit, we have designed several kinds of near-field and far-field superlenses which are based on anisotropic metamaterials or subwavelength metallic metasurfaces. Besides, two kinds of functional couplers are also designed to realize subwavelength manipulations of spoof surface plasmon polaritons supported on metasurfaces.
© 2016 Optical Society of AmericaPDF Article