3D g-Factor Mapping: Fine Structure Effects in Single Quantum Dots

M Ediger, AM Wilson, IM Piper, RT Phillips, M Hugues, M Hopkinson

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

Abstract

We have employed a novel fibre‐based confocal microscope to measure the magneto‐photoluminescence of single InGaAs quantum dots at arbitrary angles, of tilt and rotation, with respect to magnetic fields of up to 10 T. Modelling the bright and dark exciton emissions as a function of the field strength and angle using the spin Hamiltonian derived by Van Kesteren et al. gives access to a unique set of 9 parameters (electron and hole g‐factors and exchange terms) for the 3D fine structure of each quantum dot. We find strong asymmetries for the in‐plane to growth direction tensor components, but little to no significant in‐plane variations in our sample. Interestingly, anti‐crossings at intermediate tilt angles provide a direct measure of the in‐plane electron and hole g‐factor.
Translated title of the contribution3D g-Factor Mapping: Fine Structure Effects in Single Quantum Dots
Original languageEnglish
Title of host publication30th International Conference on the Physics of Semiconductors
PublisherAmerican Institute of Physics (AIP)
Pages441 - 442
Number of pages2
Volume1399
ISBN (Print)9780735410022
DOIs
Publication statusPublished - 2010

Bibliographical note

Name and Venue of Event: Seoul, Korea
Conference Proceedings/Title of Journal: AIP Conference Proceedings
Conference Organiser: American Institute of Physics

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