System for detecting terahertz radiation based on electro-optical detection
A terahertz radiation detection system based on electro-optical detection on a ZnTe crystal (0.3–1 mm thick) consists of a parabolic mirror focusing terahertz radiation on a ZnTe crystal, where birefringence of femtosecond probe radiation occurs under the action of terahertz radiation, λ / 4 plate, which controls polarization state, Wollaston prism, balanced detector (Nirvana 2007https: //www.newport.com/p/2007), synchronous amplifier (Ametek SI Recovery Signal model 7265 http: //www.ameteksi.com/products/lock-in-amplifiers / 7265-dual-phase-lock-in-amplifier and PC.