Dispersion of the electron g factor anisotropy in InAs/InP self-assembled quantum dots

Journal Article · Sun Aug 28 00:00:00 EDT 2016 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4961201· OSTI ID:22598876

Yakovlev, D. R.; Bayer, M. ^[1]; Schindler, J. J. ^[1]; Bree, J. van; Koenraad, P. M.; Averkiev, N. S. ^[2]

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1. Experimentelle Physik 2, Technische Universität Dortmund, D-44221 Dortmund (Germany)
2. Ioffe Institute, Russian Academy of Sciences, 194021 St. Petersburg (Russian Federation)

The electron g factor in an ensemble of InAs/InP quantum dots with emission wavelengths around 1.4 μm is measured using time-resolved pump-probe Faraday rotation spectroscopy in different magnetic field orientations. Thereby, we can extend recent single dot photoluminescence measurements significantly towards lower optical transition energies through 0.86 eV. This allows us to obtain detailed insight into the dispersion of the recently discovered g factor anisotropy in these infrared emitting quantum dots. We find with decreasing transition energy over a range of 50 meV a strong enhancement of the g factor difference between magnetic field normal and along the dot growth axis, namely, from 1 to 1.7. We argue that the g factor cannot be solely determined by the confinement energy, but the dot asymmetry underlying this anisotropy therefore has to increase with increasing dot size.

• OSTI ID: 22598876
• Journal Information: Journal of Applied Physics, Vol. 120, Issue 8; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
DISPERSIONS
ELECTRONS
FARADAY EFFECT
INDIUM ARSENIDES
INDIUM PHOSPHIDES
LANDE FACTOR
MAGNETIC FIELDS
MEV RANGE 10-100
OPTICAL PUMPING
PHOTOLUMINESCENCE
QUANTUM DOTS
TIME RESOLUTION
WAVELENGTHS