Brightening of dark excitons in a single quantum dot containing a single magnetic ion

Abstract

A promising method to investigate dark exciton transitions in quantum dots is presented. The optical recombination of the dark exciton is allowed when the exciton state is coupled with an individual magnetic impurity (manganese ion). It is shown that the efficient radiative recombination is possible when the exchange interaction with the magnetic ion is accompanied by a mixing of the heavy-light hole states related to an in-plane anisotropy of the quantum dot. It is also shown that the dark exciton recombination is an efficient channel of manganese spin orientation.

4 pages, 3 figures

References in corpus (11)

• Triggered single photons from a quantum dot
• Optical manipulation of a single Mn spin in a CdTe-based quantum dot
• Optical spin orientation of a single manganese atom in a quantum dot
• Optically probing the fine structure of a single Mn atom in an InAs quantum dot
• Single exciton spectroscopy of semimagnetic quantum dots
• Excitation mechanisms of individual CdTe/ZnTe quantum dots studied by photon correlation spectroscopy
• Quantum dot spectroscopy using cavity QED
• Optically induced energy and spin transfer in non-resonantly coupled pairs of self-assembled CdTe/ZnTe quantum dots
• Magnetization dynamics down to zero field in dilute (Cd,Mn)Te quantum wells
• Manipulating the exciton fine structure of single CdTe/ZnTe quantum dots by an in-plane magnetic field
• Optical orientation of a single Mn spin in a quantum dot: Role of carrier spin relaxation

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