Fine structure and spin quantum beats in InP quantum dots in a magnetic field

I. A. Yugova; I. Ya. Gerlovin; V. G. Davydov; I. V. Ignatiev; I. E. Kozin; H. W. Ren; M. Sugisaki; S. Sugou; Y. Masumoto

doi:10.1103/PhysRevB.66.235312

Fine structure and spin quantum beats in InP quantum dots in a magnetic field

I. A. Yugova, I. Ya. Gerlovin, V. G. Davydov, I. V. Ignatiev, I. E. Kozin, H. W. Ren, M. Sugisaki, S. Sugou, and Y. Masumoto

Phys. Rev. B 66, 235312 – Published 16 December 2002

Abstract

The paper reports on quantum beats observed in the photoluminescence kinetics of a single layer of the InP self-assembled quantum dots in a magnetic field. It is found that the beats arise only after removal of excess charges from the quantum dots by an external electrical bias. The quantum beats are shown to be related to the interference of the excitonic fine-structure states split by the magnetic-field. The dependences of the beat characteristics on the magnetic-field strength and orientation are studied. Theoretical analysis based on a model spin Hamiltonian has allowed us to describe adequately the shape of the oscillating component of the signal. We have determined the values of the electron g-factor components and estimated the spread and the mean value of the hole g factor, as well as of the electron-hole exchange splitting parameters.

Received 13 March 2002

DOI:https://doi.org/10.1103/PhysRevB.66.235312

Authors & Affiliations

I. A. Yugova^* and I. Ya. Gerlovin^†

Institute of Physics, St.-Petersburg State University, St.-Petersburg, 198504, Russia

V. G. Davydov, I. V. Ignatiev^‡, I. E. Kozin^§, H. W. Ren^∥, M. Sugisaki^¶, S. Sugou^**, and Y. Masumoto^††

Single Quantum Dot Project, ERATO, JST, Japan

^*Electronic address: irina.yugova@pobox.spbu.ru
^†Permanent address: Vavilov State Optical Institute, St.-Petersburg, 190034, Russia.
^‡Permanent address: Institute of Physics, St.-Petersburg State University, St.-Petersburg, 198504, Russia.
^§Permanent address: Institute of Physics, St.-Petersburg State University, St.-Petersburg, 198904, Russia.
^∥Present address: Applied Optoelectronics Incorporation, Sugar Land, TX 77478.
^¶Permanent address: Faculty of Science, Osaka City University, Osaka 558-8585, Japan.
^**Permanent address: Opto-Electronic Research Laboratory, NEC Corporation, Tsukuba, 305-8501, Japan.
^††Permanent address: Institute of Physics, University of Tsukuba, Tsukuba 305–8571, Japan.

References (Subscription Required)

Click to Expand

Issue

Vol. 66, Iss. 23 — 15 December 2002

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Physical Review B

covering condensed matter and materials physics