Spatial Measurement Of Terahertz Fields By Encoding Probe Beam

Using computational algorithms to measure terahertz (THz) fields has been studied in the past decade. We develop a flexible and robust technique based on probe beam encoding. Our new approach does not require any additional manufacture, ancillary semiconductors or nanofilms. By imaging in the near-field, we can recover the THz field with 62 mu m resolution, which is 15 times smaller than the central wavelength (940 mu m).