Improved tunable InSb FIR detectors
| Autor: | K. Bochter, Erich Gornik, Gottfried Strasser, M. Witzany |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Materials science
Physics::Instrumentation and Detectors Condensed Matter::Other business.industry Photoconductivity Detector General Engineering Electron Noise (electronics) Condensed Matter::Materials Science Responsivity Laser linewidth Signal-to-noise ratio Nuclear magnetic resonance Optoelectronics business Surface states |
| Zdroj: | Infrared Physics. 32:439-442 |
| ISSN: | 0020-0891 |
| DOI: | 10.1016/0020-0891(91)90132-y |
| Popis: | We report about n-InSb tunable photoconductive detectors with a high resolution in the FIR region. The detection range can be tuned from 10 to 500 wavenumbers as a function of magnetic field. The limiting process of the signal to noise ratio in InSb detectors was found to be the recombination of electrons into surface states. By passivating these states the signal to noise ratio as well as the responsivity and the linewidth of InSb photoconductive detectors is improved considerably. The maxima in the responsivity and the signal to noise ratio can be shifted to lower energies and higher temperatures by using meander detectors. |
| Databáze: | OpenAIRE |
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