Circular polarization immunity of the cyclotron resonance photoconductivity in two-dimensional electron systems
نویسندگان
چکیده
Studying the cyclotron resonance (CR) induced photoconductivity in GaAs and HgTe two-dimensional electron structures under circularly polarized terahertz illumination, we observed an anomalous resonant photoresponse for CR inactive helicity of almost same magnitude as active helicity. This observation conflicts with simultaneous transmission measurements fundamentally contradicts conventional theory CR. We provide a possible route to explain such basic failure description light-matter interaction discuss modified dynamics near strong impurities that may local near-field coupling two modes. should result enhanced absorption both magnetic field polarities.
منابع مشابه
Superradiant decay of cyclotron resonance of two-dimensional electron gases.
We report on the observation of collective radiative decay, or superradiance, of cyclotron resonance (CR) in high-mobility two-dimensional electron gases in GaAs quantum wells using time-domain terahertz magnetospectroscopy. The decay rate of coherent CR oscillations increases linearly with the electron density in a wide range, which is a hallmark of superradiant damping. Our fully quantum mech...
متن کاملMechanisms of the microwave photoconductivity in two-dimensional electron systems with mixed disorder
I. A. Dmitriev,1,2,* M. Khodas,3 A. D. Mirlin,1,2,† D. G. Polyakov,1 and M. G. Vavilov4 1Institut für Nanotechnologie, Forschungszentrum Karlsruhe, 76021 Karlsruhe, Germany 2Institut für Theorie der Kondensierten Materie, Universität Karlsruhe, 76128 Karlsruhe, Germany 3Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, New York 11973-5000, USA ...
متن کاملTwo-dimensional cyclotron-resonance maser array: Spectral measurements with one and two electron beams
The cyclotron-resonance-maser ~CRM! array is a device in which separate electron beams perform simultaneously a cyclotron interaction with a single Bloch wave in an artificial lattice. The CRM array has the capability of generating high-power microwaves with relatively low-voltage electron beams. The low-voltage operation reduces the system overhead and leads to a relatively compact device. In ...
متن کاملCyclotron Resonance in a Two-Dimensional Electron Gas with Long-Range Randomness
We show that the cyclotron resonance in a two-dimensional electron gas has nontrivial properties if the correlation length of the disorder is larger than the Fermi wavelength: (a) The line shape assumes three different forms in strong, intermediate, and weak magnetic fields. (b) The linewidth collapses at the transition from the intermediate to the weak fields via the motional narrowing mechani...
متن کاملCyclotron Resonance in a Two-dimensional Electron Gas with Long-range Disorder
We show that the the cyclotron resonance in a two-dimensional electron gas has nontrivial properties if the correlation length of the disorder is larger than the de Broglie wavelength: (a) the linewidth depends di erently on the magnetic eld in strong, intermediate, and weak magnetic eld regimes (b) at the transition from the intermediate to the weak elds the linewidth suddenly collapses due to...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 2022
ISSN: ['1098-0121', '1550-235X', '1538-4489']
DOI: https://doi.org/10.1103/physrevb.106.l161409