Negative initial phase shift of Kerr rotation generated from the building-up process of resident electron spin polarization in a CdTe single quantum well

L.-P. Yan, M. Kurosawa, R. Kaji, G. Karczewski, S. Takeyama, and S. Adachi
Phys. Rev. B 90, 205307 – Published 19 November 2014

Abstract

Initial phase shift in a precessional motion of resident electron-spin polarization is studied in a CdTe/Cd0.85Mg0.15Te single quantum well using a time-resolved Kerr rotation technique. The generation dynamics of resident electron-spin polarization involve the formation and transformation of the associated optically excited states and are complicated particularly in the early time region. A careful analysis of the phase shift gives a deep understanding of the generation processes. In the experiments, the negative phase shift of the resident electron-spin polarization is observed, and the mechanism associated especially with a quick hole spin flip in negative trions is studied through the dependences on excitation power and magnetic field strength.

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  • Received 17 August 2014
  • Revised 14 October 2014

DOI:https://doi.org/10.1103/PhysRevB.90.205307

©2014 American Physical Society

Authors & Affiliations

L.-P. Yan1, M. Kurosawa1, R. Kaji1, G. Karczewski2, S. Takeyama3, and S. Adachi1,*

  • 1Department of Applied Physics, Hokkaido University, N13 W8, Kitaku, Sapporo 060-8628, Japan
  • 2Institute of Physics, Polish Academy of Sciences, 02-668 Warsaw, Poland
  • 3Institute for Solid State Physics, University of Tokyo, 277-8581 Kashiwa, Japan

  • *adachi-s@eng.hokudai.ac.jp

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Vol. 90, Iss. 20 — 15 November 2014

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