Broadband terahertz time-domain spectroscopy and fast FMCW imaging: Principle and applications
Shen Yao-Chun, Yang Xing-Yu, Zhang Zi-Jian
       

Experimental arrangement for coherent THz generation and detection. Insert: Generated THz radiation is emitted from both sides of the GaAs wafer and the backwards THz radiation is collected in our measurements. (BS: beam-splitter; PM: off-axis parabolic mirror; WP: Wollaston prism).