Realization of AlGaAs antidot arrays by pulsed laser interference gratings
| Autor: | Michael K. Kelly, Werner Wegscheider, Max Bichler, B. Dahlheimer, J. Rogg, C. N. Nebel, Martin Rother, Martin Stutzmann |
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| Rok vydání: | 1997 |
| Předmět: |
Electron mobility
Electron density Materials science Magnetoresistance Condensed matter physics business.industry Laser beam machining General Physics and Astronomy 530 Physik Laser law.invention Gallium arsenide chemistry.chemical_compound Van der Pauw method Interference (communication) chemistry law Optoelectronics business |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 1089-7550 0021-8979 |
| Popis: | AlGaAs antidot arrays with about 107 antidots are produced by single-shot interference processing with a pulsed high-power Nd:YAG laser system. We apply magnetotransport experiments and atomic force microscopy (AFM) to explore the electronic and geometric properties of the arrays. The size of the antidot arrays are 3 mm × 3 mm and the period varies from 400 to 1000 nm. The dots are elliptic or circular and have diameters ranging from 255 to 690 nm. The magnetotransport experiments are performed at 1.5 K in van der Pauw contact configuration. The laser structuring leaves the two dimensional electron density nearly unchanged but decreases the mobility by a factor of about 30. Several maxima are detected in the low magnetic field magnetoresistivity which are discussed based on the geometric data determined by AFM. |
| Databáze: | OpenAIRE |
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