External magnetic field distribution mapping using terahertz emission from indium antimonide

We demonstrate and report the feasibility of utilizing terahertz (THz) surface emission from semiconductors as a mapping tool for magnetic field distribution. Using a standard THz time-domain spectroscopy setup, the THz emission of indium antimonide (InSb) was systematically measured at several different points of an external magnetic field. The initial results suggest promising directions in developing a practical THz emission-based magnetic field mapping technique for non-destructive electromagnetic imaging applications. (C) 2017 The Japan Society of Applied Physics