Polarimetry of photon echo on charged and neutral excitons in semiconductor quantum wells.

Autor: Poltavtsev SV; Experimentelle Physik 2, Technische Universität Dortmund, 44221, Dortmund, Germany. sergei.poltavtcev@tu-dortmund.de.; Spin Optics Laboratory, St. Petersburg State University, 198504, St. Petersburg, Russia. sergei.poltavtcev@tu-dortmund.de., Kapitonov YV; Physics Faculty, St. Petersburg State University, 199034, St. Petersburg, Russia., Yugova IA; Physics Faculty, St. Petersburg State University, 199034, St. Petersburg, Russia., Akimov IA; Experimentelle Physik 2, Technische Universität Dortmund, 44221, Dortmund, Germany.; Ioffe Physical-Technical Institute, Russian Academy of Sciences, 194021, St. Petersburg, Russia., Yakovlev DR; Experimentelle Physik 2, Technische Universität Dortmund, 44221, Dortmund, Germany.; Ioffe Physical-Technical Institute, Russian Academy of Sciences, 194021, St. Petersburg, Russia., Karczewski G; Institute of Physics, Polish Academy of Sciences, PL-02668, Warsaw, Poland., Wiater M; Institute of Physics, Polish Academy of Sciences, PL-02668, Warsaw, Poland., Wojtowicz T; International Research Centre MagTop, Institute of Physics, Polish Academy of Sciences, PL-02668, Warsaw, Poland., Bayer M; Experimentelle Physik 2, Technische Universität Dortmund, 44221, Dortmund, Germany.; Ioffe Physical-Technical Institute, Russian Academy of Sciences, 194021, St. Petersburg, Russia.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2019 Apr 05; Vol. 9 (1), pp. 5666. Date of Electronic Publication: 2019 Apr 05.
DOI: 10.1038/s41598-019-42208-8
Abstrakt: Coherent optical spectroscopy such as four-wave mixing and photon echo generation deliver rich information on the energy levels involved in optical transitions through the analysis of polarization of the coherent response. In semiconductors, it can be applied to distinguish between different exciton complexes, which is a highly non-trivial problem in optical spectroscopy. We develop a simple approach based on photon echo polarimetry, in which polar plots of the photon echo amplitude are measured as function of the angle φ between the linear polarizations of the two exciting pulses. The rosette-like polar plots reveal a distinct difference between the neutral and charged exciton (trion) optical transitions in semiconductor nanostructures. We demonstrate this experimentally by photon echo polarimetry of a CdTe/(Cd, Mg)Te quantum well. The echoes of the trion and donor-bound exciton are linearly polarized at the angle 2φ with respect to the first pulse polarization and their amplitudes are weakly dependent on φ. While on the exciton the photon echo is co-polarized with the second exciting pulse and its amplitude scales as cosφ.
Databáze: MEDLINE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje