Circular polarization immunity of the cyclotron resonance photoconductivity in two-dimensional electron systems
| Autor: | E. Mönch, P. Euringer, G.-M. Hüttner, I. A. Dmitriev, D. Schuh, M. Marocko, J. Eroms, D. Bougeard, D. Weiss, S. D. Ganichev |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Popis: | Studying the cyclotron resonance (CR)-induced photoconductivity in GaAs and HgTe two-dimensional electron structures, we observed an anomalous photoresponse for the CR-inactive geometry being of almost the same magnitude as the CR-active one. This observation conflicts with simultaneous transmission measurements and contradicts the conventional theory of CR which predicts no resonant response for the CR-inactive geometry. We provide a possible route to explain this fundamental failure of the conventional description of light-matter interaction and discuss a modified electron dynamics near strong impurities that may provide a local near-field coupling of the two helicity modes of the terahertz field at low temperatures. This should result in a CR-enhanced local absorption and, thus, CR photoconductivity for both magnetic field polarities. 21 pages, 20 figures |
| Databáze: | OpenAIRE |
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