A fast infrared detector based on patterned YBCO thin film
| Autor: | Dag Winkler, Boris S. Karasik, M. A. Zorin, V. Trifonov, Mikael Lindgren, E. M. Gershenzon, G.N. Gol'tsman, M. Danerud |
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| Rok vydání: | 1994 |
| Předmět: |
Resistive touchscreen
Materials science Infrared business.industry Far-infrared laser Metals and Alloys Substrate (electronics) Condensed Matter Physics Laser law.invention Condensed Matter::Materials Science Optics law Condensed Matter::Superconductivity Picosecond Materials Chemistry Ceramics and Composites Infrared detector Electrical and Electronic Engineering Thin film business |
| Zdroj: | Superconductor Science and Technology. 7:321-323 |
| ISSN: | 1361-6668 0953-2048 |
| DOI: | 10.1088/0953-2048/7/5/024 |
| Popis: | Detectors for infrared radiation ( lambda =0.85 mu m) were made of 50 nm thick YBa2Cu3O7- delta films on LaAlO3 and MgO or 60 nm thick films on NdGaO3. Parallel strips (1 mu m wide by 20 mu m long) were patterned in the films and formed the active device. These devices were designed to detect short infrared laser pulses by electron heating. The detectors were current biased into the resistive and the normal states. The response was studied in direct pulse measurements as well as by amplitude modulation of a laser. The pulse measurements showed a fast picosecond response followed by a slower decay related to phonon escape through the film-substrate interface and heat diffusion in the substrate. The frequency spectra up to 10 GHz showed two slopes with a knee corresponding to the phonon escape time. |
| Databáze: | OpenAIRE |
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