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.
JI Appl. Phys. Lett.
PY 2005
BP 244104 (1 to 3)
VL 86
DE HEB; QCL
AB We report the first demonstration of an all solid-stateheterodyne receiver that can be used for high-resolution spectroscopy above 2THz suitable for space-based observatories. The receiver uses a NbN superconducting hot-electron bolometer as mixer and a quantum cascade laser operating at 2.8THz as local oscillator. We measure a double sideband receiver noise temperature of 1400K at 2.8THz and 4.2K, and find that the free-running QCL has sufficient power stability for a practical receiver, demonstrating an unprecedented combination of sensitivity and stability.
ER