Terahertz photonic mixers as local oscillators for hot electron bolometer and superconductor-insulator-superconductor astronomical receivers

Details Terahertz photonic mixers as local oscillators for hot electron bolometer and superconductor-insulator-superconductor astronomical receivers Terahertz photonic mixers as local oscillators for hot electron bolometer and superconductor-insulator-superconductor astronomical receivers

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jap...100d3116c&link_type=abstract

Journal of Applied Physics, Volume 100, Issue 4, pp. 043116-043116-4 (2006).

Physics

7

Bolometers, Infrared, Submillimeter Wave, Microwave, And Radiowave Receivers And Detectors, Modulators And Demodulators, Discriminators, Comparators, Mixers, Limiters, And Compressors, Superconducting Infrared, Submillimeter And Millimeter Wave Detectors, Radiowave And Microwave Technology, Photodetectors, Photoconductors And Bolometers

Scientific paper

A pump experiment of two astronomical heterodyne receivers, a superconductor- insulator-superconductor (SIS) receiver at 450 GHz and a hot-electron-bolometer (HEB) receiver at 750 GHz, is reported. A low-temperature-grown GaAs metal-semiconductor-metal photonic local oscillator (LO) was illuminated by two near infrared semiconductor lasers, generating a beat frequency in the submillimeter range. I-V junction characteristics for different LO pump power levels demonstrate that the power delivered by the photomixer is sufficient to pump a SIS and a HEB mixer. SIS receiver noise temperatures were compared using a conventional solid-state LO and a photonic LO. In both cases, the best receiver noise temperature was identical (Tsys=170 K).

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