Investigation of THz imaging artifacts generated by oversampling and interpolation of diffraction-limited low-resolution data

In this work, we investigate artifacts that can be generated during the post-processing of THz imaging data using spatial oversampling and interpolation - as often applied to artificially increase the impression of spatial resolution. We also present Terahertz (THz) near-field measurements with subwavelength resolution and compare them to diffraction-limited far-field measurements.