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Title: CdSe/ZnSe quantum dot with a single Mn{sup 2+} ion—A new system for a single spin manipulation

We present a magneto-optical study of individual self-assembled CdSe/ZnSe quantum dots doped with single Mn{sup 2+} ions. Properties of the studied dots are analyzed analogously to more explored system of Mn-doped CdTe/ZnTe dots. Characteristic sixfold splitting of the neutral exciton emission line as well as its evolution in the magnetic field are described using a spin Hamiltonian model. Dynamics of both exciton recombination and Mn{sup 2+} spin relaxation are extracted from a series of time-resolved experiments. Presence of a single dopant is shown not to affect the average excitonic lifetime measured for a number of nonmagnetic and Mn-doped dots. On the other hand, non-resonant pumping is demonstrated to depolarize the Mn{sup 2+} spin in a quantum dot placed in external magnetic field. This effect is utilized to determine the ion spin relaxation time in the dark.
Authors:
 [1]
  1. Institute of Experimental Physics, Faculty of Physics, University of Warsaw, ul. Hoża 69, 00-681 Warsaw (Poland)
Publication Date:
OSTI Identifier:
22399286
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 11; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CADMIUM SELENIDES; CADMIUM TELLURIDES; DOPED MATERIALS; EMISSION; HAMILTONIANS; LIFETIME; MAGNETIC FIELDS; MAGNETO-OPTICAL EFFECTS; MANGANESE IONS; PUMPING; QUANTUM DOTS; RECOMBINATION; RELAXATION TIME; SPIN; TIME RESOLUTION; ZINC SELENIDES; ZINC TELLURIDES