Request InfoAltos Photonics Inc.Ekspla has introduced a terahertz spectroscopy kit that includes the components to construct an optical system for terahertz time-domain spectroscopy (Thz-TDS). A gallium arsenide (GaAs) photoconductive switch, pumped by an ultrashort laser (<100 fs), is used as an emitter and detector of THz radiation. The usable spectral range extends from 200 GHz to 2 THz. 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