Terahertz Detection with Twin Superconductor--Insulator--Superconductor Tunnel Junctions

Chin. Phys. Lett.

2007, Vol. 24

Issue (2): 570-573 DOI:

Original Articles

Terahertz Detection with Twin Superconductor--Insulator--Superconductor Tunnel Junctions

LI Jing¹;WANG Ming-Jye²;SHI Sheng-Cai¹;Hiroshi Matsuo³

¹Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008 ²Institute of Astronomy and Astrophysics, Academia Sinica, Taipei ³National Astronomical Observatory of Japan, NINS, Japan

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LI Jing, WANG Ming-Jye, SHI Sheng-Cai et al 2007 Chin. Phys. Lett. 24 570-573

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Abstract Terahertz detection with twin superconductor--insulator--superconductor (SIS) tunnel junctions, which are connected in parallel via an inductive thin-film superconducting microstrip line, is mainly studied. Firstly, we investigate the direct-detection response of a superconducting twin-junction device by means of a Fourier transform spectrometer. Secondly, we construct a direct-detection model of twin SIS tunnel junctions. The superconducting twin-junction device is then simulated in terms of the constructed model. The simulation result is found to be in good agreement with the measured one. In addition, we observe that the direct-detection response of the device is consistent with the noise temperature behaviour.

Keywords: 85.25.Pb 85.25.Am 95.55.Jz

Received: 08 September 2006 Published: 24 February 2007

PACS:	85.25.Pb	(Superconducting infrared, submillimeter and millimeter wave detectors)
	85.25.Am	(Superconducting device characterization, design, and modeling)
	95.55.Jz	(Radio telescopes and instrumentation; heterodyne receivers)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2007/V24/I2/0570

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	LI Jing
	WANG Ming-Jye
	SHI Sheng-Cai
	Hiroshi Matsuo

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