Low noise NbN lattice-cooled superconducting hot-electron bolometric mixers at submillimeter wavelengths
- Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138 (United States)
- Moscow State Pedagogical University, Moscow, 119435 (Russia)
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 {approximately}10 {mu}m{sup 2} area. The local oscillator power for optimal performance is estimated to be 0.5 {mu}W, 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. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 522550
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 12 Vol. 70; ISSN 0003-6951; ISSN APPLAB
- Country of Publication:
- United States
- Language:
- English
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