Terahertz heterodyne receiver based on a quantum cascade laser and a superconducting bolometer
| Autor: | M. Hajenius, J. N. Hovenier, Jochem J. A. Baselmans, T. M. Klapwijk, Benjamin S. Williams, Qing Hu, Tjeerd O. Klaassen, Andrey M. Baryshev, Aurèle J. L. Adam, Jian-Rong Gao, Z. Q. Yang, Sushil Kumar, John L. Reno |
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| Jazyk: | angličtina |
| Rok vydání: | 2005 |
| Předmět: |
Physics
Noise temperature submillimetre wave oscillators Physics and Astronomy (miscellaneous) Sideband quantum cascade lasers business.industry Terahertz radiation Local oscillator heterodyne detection Superheterodyne receiver Bolometer niobium compounds law.invention law submillimetre wave receivers Optoelectronics Heterodyne detection hot carriers Quantum cascade laser business bolometers submillimetre wave mixers superconducting mixers |
| Zdroj: | Applied Physics Letters, 86 (24), 2005 |
| ISSN: | 0003-6951 |
| Popis: | We report the first demonstration of an all solid-state heterodyne receiver that can be used for high-resolution spectroscopy above 2?THz suitable for space-based observatories. The receiver uses a NbN superconducting hot-electron bolometer as mixer and a quantum cascade laser operating at 2.8?THz as local oscillator. We measure a double sideband receiver noise temperature of 1400?K at 2.8?THz and 4.2?K, and find that the free-running QCL has sufficient power stability for a practical receiver, demonstrating an unprecedented combination of sensitivity and stability. |
| Databáze: | OpenAIRE |
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