High dynamic range single channel sampling of wideband RF signals using ultra‐fast nanoscale photoconductive switching
| Autor: | Daniel Dolfi, Malek Zegaoui, Perrine Berger, Didier Decoster, C. Tripon-Canseliet, G. Jestin, J. Chazelas, J.M. Hodé, C. Coinon, A. Descamps-Mandine, I. Maksimovic, G. Baili |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
business.industry 02 engineering and technology Carrier lifetime 021001 nanoscience & nanotechnology Noise (electronics) Gallium arsenide chemistry.chemical_compound 020210 optoelectronics & photonics chemistry 0202 electrical engineering electronic engineering information engineering Optoelectronics Radio frequency Electrical and Electronic Engineering Photonics Wideband 0210 nano-technology business Microwave High dynamic range |
| Zdroj: | Electronics Letters. 52:237-239 |
| ISSN: | 1350-911X 0013-5194 |
| DOI: | 10.1049/el.2015.2418 |
| Popis: | This Letter reports on new experimental high dynamic range sub-sampling performances obtained from nanoscale microwave photoconductive switches operating under a 0.8 µm wavelength pulsed illumination. Experimental results have been performed on different samples benefiting of a low temperature grown Gallium Arsenide absorbing layer on GaAs substrate, coplanar microwave electrode profile optimisation, and the use of an ultra-low noise jitter optical source delivering optical pulses of 1 to10 ps pulse width at a 2 GHz repetition frequency at 0.8 µm optical wavelength. Thanks to carrier lifetime tunability achievement from 1 to 20 ps, in association with a carrier mobility of 3900 cm²/V.s, experimental demonstrations of 54 and 45 dB signal-to-noise ratio microwave signal sampling for signals at 5,76 and 20 GHz frequency bandwidth respectively confirms submicron devices functionality as a new class of single channel photonic analogue to digital converters. |
| Databáze: | OpenAIRE |
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