Leveraging the Nonlinearity of THz Photomultiplier Tubes for Enhanced Spectroscopic Sensitivity

Addressing the challenge of achieving high differential sensitivity in THz spectroscopy for spectroscopic analysis, this study evaluates the Terahertz Photomultiplier Tube (THz-PMT) in conjunction with an injection-seeded THz-wave parametric generator (is-TPG). Through two experimental setups, the performance of THz-PMT is contrasted with a pyro-electric detector, underscoring the benefits of THz-PMT's nonlinear response. The research further delves into the effectiveness of using a THz source and detector independently, offering insights into their potential for advancing THz spectroscopy applications.