Review of Near-Field Terahertz Measurement Methods and Their Applications: How to Achieve Sub-Wavelength Resolution at THz Frequencies

In the last decades, many research teams working at Terahertz frequencies focused their efforts on surpassing the diffraction limit. Numerous techniques have been investigated, combining methods existing at optic wavelength with THz system such as Time Domain Spectroscopy. The actual development led on one side to a resolution as high as ?/3000...