Huber, W. M. and Arendt, B. and Huggard, P. G. and Prettl, Wilhelm (1995) Square-law Josephson detection of far-infrared radiation with current-biased granular Tl2Ba2CaCu2O8 thin films. SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 8 (10). pp. 769-773. ISSN 0953-2048
Full text not available from this repository.Abstract
The far-infrared photoresponse of granular thin film Tl2Ba2CaCU2O8 has been investigated at relatively low optical powers obtained from a c.w. laser source. Both bolometric and Josephson detection has been observed at wavelengths between 214 mu m and 1011 mu m. In contrast to measurements made with higher-power pulsed radiation, a Josephson photosignal proportional to incident power is obtained in this spectral range. The responsivity is found to increase strongly with wavelength, approximately proportionally to lambda 2.5, with a measured sensitivity of 12 V W-1 at 1011 mu m and a corresponding NEP of 2 x 10(-8) W Hz(-1/2). The photoresponse dependences on wavelength and power are compared with recent numerical predictions of the behaviour of two-dimensional Josephson junction arrays with random defects (Cai et al 1994 Phys. Rev. B 49 4015). The observed square-law response and strongly increased responsivity at longer wavelengths indicate the potential of utilizing such films as rugged, fast, large-area video detectors for the sub-mm/microwave spectral range.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | BA-CU-O; SUPERCONDUCTING FILMS; VINYL FLUORIDE; PHOTORESPONSE; BI2SR2CACU2O8; LASER |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Wilhelm Prettl |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 04 Jan 2024 09:50 |
| Last Modified: | 04 Jan 2024 09:50 |
| URI: | https://pred.uni-regensburg.de/id/eprint/52301 |
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