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arXiv · 2206.07617

Circular polarization immunity of the cyclotron resonance photoconductivity in two-dimensional electron systems

Erwin Mönch·Philipp Euringer·Georg-Maximilian Hüttner·Ivan A. Dmitriev·Dieter Schuh·Marina Marocko·Jonathan Eroms·Dominique Bougeard·Dieter Weiss·Sergey D. Ganichev
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Abstract

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.

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Erwin Mönch, Philipp Euringer, Georg-Maximilian Hüttner, Ivan A. Dmitriev, Dieter Schuh, Marina Marocko, Jonathan Eroms, Dominique Bougeard, Dieter Weiss, Sergey D. Ganichev. 2022-06-15. Circular polarization immunity of the cyclotron resonance photoconductivity in two-dimensional electron systems. https://doi.org/10.1103/physrevb.106.l161409

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