PT Journal AU Gao, JR Hovenier, JN Yang, ZQ Baselmans, JJA Baryshev, A Hajenius, M Klapwijk, TM Adam, AJL Klaassen, TO Williams, BS Kumar, S Hu, Q Reno, JL TI Terahertz heterodyne receiver based on a quantum cascade laser and a superconducting bolometer SO Appl. Phys. Lett. PY 2005 IS 86 ER