Chin. Phys. Lett.  2011, Vol. 28 Issue (1): 010702    DOI: 10.1088/0256-307X/28/1/010702
GENERAL |
Terahertz Direct Detection Characteristics of a Superconducting NbN Bolometer
REN Yuan1,2, MIAO Wei1, YAO Qi-Jun1, ZHANG Wen1, SHI Sheng-Cai1**
1Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008
2Graduate School of the Chinese Academy of Sciences, Beijing 100049
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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.
Keywords: 07.57.Kp      05.40.Ca     
Received: 17 August 2010      Published: 23 December 2010
PACS:  07.57.Kp (Bolometers; infrared, submillimeter wave, microwave, and radiowave receivers and detectors)  
  05.40.Ca (Noise)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/28/1/010702       OR      https://cpl.iphy.ac.cn/Y2011/V28/I1/010702
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REN Yuan
MIAO Wei
YAO Qi-Jun
ZHANG Wen
SHI Sheng-Cai
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