P
Paul A. Dalgarno
Researcher at Heriot-Watt University
Publications - 80
Citations - 2674
Paul A. Dalgarno is an academic researcher from Heriot-Watt University. The author has contributed to research in topics: Quantum dot & Exciton. The author has an hindex of 25, co-authored 76 publications receiving 2440 citations. Previous affiliations of Paul A. Dalgarno include Centre national de la recherche scientifique & University of St Andrews.
Papers
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Journal ArticleDOI
Optical pumping of a single hole spin in a quantum dot
Brian D. Gerardot,Daniel Brunner,Paul A. Dalgarno,Patrik Öhberg,Stefan Seidl,Martin Kroner,Khaled Karrai,Nick Stoltz,Pierre Petroff,Richard J. Warburton +9 more
TL;DR: High fidelity initialization of a single hole spin confined to a self-assembled quantum dot by optical pumping is demonstrated, demonstrating a negligible hole spin hyperfine interaction and suggesting a route to the realization of solid-state quantum networks that can intra-convert the spin state with the polarization of a photon.
Journal ArticleDOI
A coherent single-hole spin in a semiconductor.
Daniel Brunner,Brian D. Gerardot,Paul A. Dalgarno,Gunter Wüst,Khaled Karrai,Nick Stoltz,Pierre Petroff,Richard J. Warburton,Richard J. Warburton +8 more
TL;DR: The results demonstrate that a hole spin in a quantum dot is highly coherent, and the strategy of using holes instead of electrons may provide a solution to the decoherence problem.
Journal ArticleDOI
Manipulating exciton fine structure in quantum dots with a lateral electric field
Brian D. Gerardot,Stefan Seidl,Paul A. Dalgarno,Richard J. Warburton,Daniel Granados,Jorge M. Garcia,K. Kowalik,Olivier Krebs,K. Karrai,Antonio Badolato,Pierre M. Petroff +10 more
TL;DR: In this article, the fine structure of the neutral exciton in a single self-assembled InGaAs quantum dot is investigated under the effect of a lateral electric field, showing that the electric field strongly affects the exciton fine-structure splitting due to active manipulation of the single particle wave functions.
Journal ArticleDOI
Voltage control of the spin dynamics of an exciton in a semiconductor quantum dot.
Jason M. Smith,Paul A. Dalgarno,Richard J. Warburton,Alexander O. Govorov,Khaled Karrai,Brian D. Gerardot,Brian D. Gerardot,Pierre Petroff +7 more
TL;DR: The spin-flip mechanism involves a spin exchange with the Fermi sea in the back contact of the device and corresponds to the high temperature Kondo regime and the Anderson Hamiltonian is used to calculate a spin-Flip rate.
Journal ArticleDOI
Probing single-charge fluctuations at a GaAs/AlAs interface using laser spectroscopy on a nearby InGaAs quantum dot.
Julien Houel,Andreas V. Kuhlmann,Lukas Greuter,Fei Xue,Martino Poggio,Brian D. Gerardot,Paul A. Dalgarno,Antonio Badolato,Pierre Petroff,Arne Ludwig,Arne Ludwig,Dirk Reuter,Andreas D. Wieck,Richard J. Warburton +13 more
TL;DR: It is demonstrated that the quantum dot is sensitive to changes in the local environment at the single-charge level and the main source of charge noise in the commonly used optical field-effect devices is identified.