S Iwamatsu (Center of Semiconductor Technology and Optoelectronics (ZHO)), H Gohil (STFC Rutherford Appleton Lab.), M Grzeslo (Center of Semiconductor Technology and Optoelectronics (ZHO)), H Wang (STFC Rutherford Appleton Lab.), NJ Brewster (STFC Rutherford Appleton Lab.), M Merritt (STFC Rutherford Appleton Lab.), JL Fernandez-Estevez (Center of Semiconductor Technology and Optoelectronics (ZHO)), J Strah (Center of Semiconductor Technology and Optoelectronics (ZHO)), T Neerfeld (Center of Semiconductor Technology and Optoelectronics (ZHO)), J Tebart (Center of Semiconductor Technology and Optoelectronics (ZHO)), S Makhlouf (Center of Semiconductor Technology and Optoelectronics (ZHO)), D Headland (Terahertz Engineering Laboratory), M Ali (LeapWave Technologies), G Carpintero (LeapWave Technologies), PG Huggard (STFC Rutherford Appleton Lab.), A Stöhr (Center of Semiconductor Technology and Optoelectronics (ZHO))