The signal-to-noise ratio obtained from terahertz time-domain spectroscopy is significantly affected by the low available power of terahertz waves. We constructed a terahertz-wave source with emission power enhanced by a magnetic field. The emitter is composed of an InAs wafer and two neodymium magnets. The emitter was irradiated by femtosecond laser pulses. The data quality of terahertz spectroscopic measurements was evaluated, and reduction of error in the data obtained due to the terahertz power enhancement was observed.
International Letters of Chemistry, Physics and Astronomy (Volume 62)
K. Yano and T. Hattori, "Improving a Terahertz Time-Domain Spectroscopy Apparatus Using Neodymium Magnets", International Letters of Chemistry, Physics and Astronomy, Vol. 62, pp. 10-14, 2015