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Terahertz Direct Detection Characteristics of a Superconducting NbN Bolometer |
REN Yuan1,2, MIAO Wei1, YAO Qi-Jun1, ZHANG Wen1, SHI Sheng-Cai1**
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1Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008
2Graduate School of the Chinese Academy of Sciences, Beijing 100049
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Cite this article: |
REN Yuan, MIAO Wei, YAO Qi-Jun et al 2011 Chin. Phys. Lett. 28 010702 |
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Abstract We report the terahertz direct detection characteristics of a spiral antenna coupled NbN superconducting hot-electron bolometer (HEB) at a bath temperature of 4.2 K. Thermal conductance determined from resistance transition curves with different bias currents is found to be 3×10−7 W/K. The device shows a read-out circuit limited noise equivalent power (NEP) of 4.5×10−12 W/Hz1/2 at 4.2 K with a home-made transimpedance amplifier operating at room temperature.
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Keywords:
07.57.Kp
05.40.Ca
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Received: 17 August 2010
Published: 23 December 2010
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PACS: |
07.57.Kp
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(Bolometers; infrared, submillimeter wave, microwave, and radiowave receivers and detectors)
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05.40.Ca
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(Noise)
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