Relaxation of the Excited States of Arsenic in Strained Germanium
| Autor: | V. D. Kukotenko, R.Kh. Zhukavin, V.N. Shastin, Yu. Yu. Choporova, N. V. Abrosimov, Heinz-Wilhelm Hübers, K. A. Kovalevsky, V. V. Tsyplenkov, S.G. Pavlov, Boris A. Knyazev |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
chemistry.chemical_element Germanium 02 engineering and technology Radiation 01 natural sciences law.invention law 0103 physical sciences Arsenic 010302 applied physics Ultrafast phenomena 021001 nanoscience & nanotechnology Condensed Matter Physics Laser Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials chemistry Relaxation rate Excited state Relaxation (physics) Atomic physics 0210 nano-technology Ground state Impurity |
| Popis: | The relaxation times of the lower p states of the arsenic donor in a germanium crystal strained along the [111] crystallographic direction are studied. Measurements are performed by the pump–probe method, using free-electron laser radiation. The states are excited from the 1s (Γ1) ground state. The experimentally measured decay times of the 2p0, 3p0, and 2p± states are 1.3, no more than 0.2, and 0.4 ns, respectively. It is shown that the relatively high relaxation rate of the 2p± state is defined by the interaction with intravalley TA photons. |
| Databáze: | OpenAIRE |
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