Polarisation-Sensitive THz Detectors
  We have developed a detector of coherent terahertz (THz) radiation that can recover the full polarisation state of a THz transient. The device is three-contact photoconductive receiver, which is capable of recording two time-varying electric field components of a THz pulse simultaneously. Our receiver was fabricated on Fe+ implanted InP and showed a cross-polarised extinction ratio greater than 100:1. The detector will be useful for spectroscopy of birefringent and optically active materials. 
M.B. Johnston, E. Castro-Camus, J. Lloyd-Hughes, M.D. Fraser, H.H. Tan   and C. Jagadish