Full characterization and analysis of a terahertz heterodyne receiver based on a NbN hot electron bolometer
| Autor: | J. R. Gao, Willem Jellema, Jacob Kooi, Andrey M. Baryshev, M. Hajenius, Jochem J. A. Baselmans, Z. Q. Yang, T. M. Klapwijk |
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| Přispěvatelé: | Astronomy |
| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
oscillators
Terahertz radiation Local oscillator Superheterodyne receiver General Physics and Astronomy superconducting microwave devices niobium compounds law.invention NOISE broadband antennas law TECHNOLOGY Physics Noise temperature STABILITY business.industry RANGE Bolometer Bandwidth (signal processing) PERFORMANCE Laser submillimetre wave antennas Intermediate frequency submillimetre wave receivers slot antennas Optoelectronics MIXERS LASER SENSITIVITY business Caltech Library Services bolometers submillimetre wave mixers |
| Zdroj: | Journal of Applied Physics, 100(7):074507, 074507-1-074507-10. AMER INST PHYSICS Journal of Applied Physics, 100 (7), 2006 |
| ISSN: | 0021-8979 |
| Popis: | We present a complete experimental characterization of a quasioptical twin-slot antenna coupled small area (1.0x0.15 mu m(2)) NbN hot electron bolometer (HEB) mixer compatible with currently available solid state tunable local oscillator (LO) sources. The required LO power absorbed in the HEB is analyzed in detail and equals only 25 nW. Due to the small HEB volume and wide antenna bandwidth, an unwanted direct detection effect is observed which decreases the apparent sensitivity. Correcting for this effect results in a receiver noise temperature of 700 K at 1.46 THz. The intermediate frequency (IF) gain bandwidth is 2.3 GHz and the IF noise bandwidth is 4 GHz. The single channel receiver stability is limited to 0.2-0.3 s in a 50 MHz bandwidth. |
| Databáze: | OpenAIRE |
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