Conference on Lasers and Electro-Optics (CLEO), San-Jose, Costa Rica, 8 - 13 June 2014
An all-optical, sub-wavelength terahertz characterization technique based on an ultra-thin-knife-edge is demonstrated employing ultraviolet-pulse to project the blade image on a ZnTe crystal, where the free carriers excited on a blade-shaped area act as field-shield.