Temporal dynamics of a magnetoexciton in a quantum well

I. Aksenov, Y. Aoyagi, J. Kusano, T. Sugano, T. Yasuda, and Y. Segawa
Phys. Rev. B 52, 17430 – Published 15 December 1995
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Abstract

Using time-resolved picosecond photoluminescence, the effects of magnetic field on the dynamics of two-dimensional heavy-hole excitons have been studied in a high-quality quantum well. Fitting the experimental results to the four-level dynamical model revealed that an increase in magnetic field resulted in (1) a decrease of the exciton radiative lifetime due to the combined effect of the magnetic-field-induced lateral shrinking of the exciton wave function and simultaneous expansion of its coherence area, as well as (2) an increase of the energy relaxation time for the optically excited carriers due to the formation of a quasi-zero-dimensional electronic density of states. Both effects have been predicted theoretically, but neither has been observed experimentally so far.

  • Received 14 September 1995

DOI:https://doi.org/10.1103/PhysRevB.52.17430

©1995 American Physical Society

Authors & Affiliations

I. Aksenov

  • Electrotechnical Laboratory, Umezono 1-1-4, Tsukuba, Ibaraki 305, Japan

Y. Aoyagi, J. Kusano, and T. Sugano

  • The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351, Japan

T. Yasuda and Y. Segawa

  • Photodynamics Research Center, RIKEN, Nagamachi, Aoba, Sendai 980, Japan

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Issue

Vol. 52, Iss. 24 — 15 December 1995

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