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

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

doi:10.1063/1.3666443

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 proceeding › Conference 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 contribution	3D g-Factor Mapping: Fine Structure Effects in Single Quantum Dots
Original language	English
Title of host publication	30th International Conference on the Physics of Semiconductors
Publisher	American Institute of Physics (AIP)
Pages	441 - 442
Number of pages	2
Volume	1399
ISBN (Print)	9780735410022
DOIs	https://doi.org/10.1063/1.3666443
Publication status	Published - 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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@inproceedings{6b27a12ef61c4de5b633ee35b50d3462,

title = "3D g-Factor Mapping: Fine Structure Effects in Single Quantum Dots",

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.",

author = "M Ediger and AM Wilson and IM Piper and RT Phillips and M Hugues and M Hopkinson",

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

year = "2010",

doi = "10.1063/1.3666443",

language = "English",

isbn = "9780735410022",

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T1 - 3D g-Factor Mapping: Fine Structure Effects in Single Quantum Dots

AU - Ediger, M

AU - Wilson, AM

AU - Piper, IM

AU - Phillips, RT

AU - Hugues, M

AU - Hopkinson, M

N1 - Name and Venue of Event: Seoul, Korea Conference Proceedings/Title of Journal: AIP Conference Proceedings Conference Organiser: American Institute of Physics

PY - 2010

Y1 - 2010

N2 - 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.

AB - 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.

U2 - 10.1063/1.3666443

DO - 10.1063/1.3666443

M3 - Conference Contribution (Conference Proceeding)

SN - 9780735410022

VL - 1399

SP - 441

EP - 442

BT - 30th International Conference on the Physics of Semiconductors

PB - American Institute of Physics (AIP)

ER -

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

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