| Autor: |
Langer L; Experimentelle Physik 2, Technische Universität Dortmund, 44221 Dortmund, Germany., Poltavtsev SV, Yugova IA, Yakovlev DR, Karczewski G, Wojtowicz T, Kossut J, Akimov IA, Bayer M |
| Jazyk: |
angličtina |
| Zdroj: |
Physical review letters [Phys Rev Lett] 2012 Oct 12; Vol. 109 (15), pp. 157403. Date of Electronic Publication: 2012 Oct 12. |
| DOI: |
10.1103/PhysRevLett.109.157403 |
| Abstrakt: |
We report on magnetic field-induced oscillations of the photon echo signal from negatively charged excitons in a CdTe/(Cd,Mg)Te semiconductor quantum well. The oscillatory signal is due to Larmor precession of the electron spin about a transverse magnetic field and depends sensitively on the polarization configuration of the exciting and refocusing pulses. The echo amplitude can be fully tuned from the maximum down to zero depending on the time delay between the two pulses and the magnetic-field strength. The results are explained in terms of the optical Bloch equations accounting for the spin level structure of electrons and trions. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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