Photoconductive detection of arbitrary polarised terahertz pulses
  To perform polarization sensitive THz-TDS, it is necessary to be able to measure two (preferably orthogonal) electric field components of a terahertz transient. We have developed a polarization sensitive detector by fabricating a three-contact photoconductive receiver. 
E. Castro-Camus, J. Lloyd-Hughes, M.B. Johnston, M.D. Fraser, H.H.   Tan, C. Jagadish