Terahertz frequency sensing

摘要

A sensor system is described wherein the sensor system comprises a support substrate comprising a semiconductor , preferably a high mobility (intrinsic) thin-film semiconductor; and, an optical system comprising an optical source and a geometrically shaped optical mask, preferably a computer-controlled spatial light modulator, said optical system being configured for exposing at least part of said thin-film semiconductor with a geometrically shaped (pulsed) light beam, said light beam forming a shaped photon-induced THz plasmonic sensing region for sensing the THz response of a small volume sample disposed on or over said support substrate in the vicinity of said plasmonic region.