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Anharmonicity of Bloch oscillations in GaAs/AlAs superlattices in the case of inhomogeneously broadened excitonic states in a weak electric field |
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| Authors: | K. L. Litvinenko I. Okhrimenko K. Köhler V. G. Lysenko K. Leo F. Löser |
| Affiliation: | 1. Institute of Microelectronics Technology and Ultrapure Materials, Russian Academy of Sciences, 142432, Chernogolovka, Moscow Region, Russia 2. Fraunhofer-Institute für Angewandte Fsetk?rperphysik, Freiburg, Germany 3. Institute für Angewandte Photophysik, Technische Universit?t Dresden, 01062, Dresden, Germany |
| Abstract: | The variation of the spectral shape of the four-wave mixing signal in GaAs/AlGaAs superlattices was studied experimentally and theoretically. It was shown that in an external electric field, leading to anti-crossing of the levels of heavy and light excitons, sawtooth oscillations of the energy position of the levels are observed. These oscillations are due to the inhomogeneous broadening of the states participating in the Bloch oscillations. Pis’ma Zh. éksp. Teor. Fiz. 67, No. 10, 820–825 (25 May 1998) |
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