Electron spin emission based terahertz spectrometer and spectral analysis system

The invention discloses an electron spin emission based terahertz spectrometer and spectral analysis system. The terahertz spectrometer comprises a fiber femtosecond laser which enables femtosecond light at a spatial light output port to enter a transmitting end; coherent detection light of the fiber output port is input to a receiving end through an optical delay line; a sample holder is positioned between the transmitting end and the receiving end; the transmitting end is used for generating terahertz pulses based on the electron spin effect of a hetero-structure under the combined effect offemtosecond laser excitation and an internal magnetic field; and the receiving end is used for forming a current under the effect of the sample terahertz pulse electric field, measuring the intensityof a specific terahertz pulse waveform point location based on the magnitude of the current, and outputting the intensity to a data acquisition and processing module so as to perform spectral analysis. Thus, the key performance indexes of the bandwidth and dynamic range of the terahertz time domain spectrometer can be effectively improved, the reliability of the whole spectrometer is improved, and the research difficulty and cost are effectively reduced.