PT Journal
AU Kawamura, J
   Blundell, R
   Tong, C-E
   Gol’tsman, G
   Gershenzon, E
   Voronov, B
   Cherednichenko, S
TI Low noise NbN lattice-cooled superconducting hot-electron bolometric mixers at submillimeter wavelengths
SO Appl. Phys. Lett.
JI Appl. Phys. Lett.
PY 1997
BP 1619
EP 1621
VL 70
IS 12
DI 10.1063/1.118634
DE NbN HEB mixers
AB Lattice-cooled superconducting hot-electron bolometric mixers are used in a submillimeter-wave waveguide heterodyne receiver. The mixer elements are niobium nitride film with 3.5 nm thickness and ∼10 μm2 area. The local oscillator power for optimal performance is estimated to be 0.5 μW, and the instantaneous bandwidth is 2.2 GHz. At an intermediate frequency centered at 1.4 GHz with 200 MHz bandwidth, the double sideband receiver noise temperature is 410 K at 430 GHz. The receiver has been used to detect molecular line emission in a laboratory gas cell.
ER