214 citations · 413 across the 6 of their papers we have counts for
6 papers
Fast preparation of single hole spin in InAs/GaAs quantum dot in Voigt geometry magnetic field
T. M. Godden, J. H. Quilter, A. J. Ramsay +6
The preparation of a coherent heavy-hole spin via ionization of a spin-polarized electron-hole pair in an InAs/GaAs quantum dot in a Voigt geometry magnetic field is investigated.…
Coherent optical control of the spin of a single hole in a quantum dot
T. M. Godden, J. H. Quilter, A. J. Ramsay +7
We demonstrate coherent optical control of a single hole spin confined to an InAs/GaAs quantum dot. A superposition of hole spin states is created by fast (10-100 ps) dissociation…
Effect of detuning on the phonon induced dephasing of optically driven InGaAs/GaAs quantum dots
A. J. Ramsay, T. M. Godden, S. J. Boyle +6
Recently, longitudinal acoustic phonons have been identified as the main source of the intensity damping observed in Rabi rotation measurements of the ground-state exciton of a sin…
Fast high fidelity hole spin initialization in a single InGaAs quantum dot
T. M. Godden, S. J. Boyle, A. J. Ramsay +2
We demonstrate fast initialization of a single hole spin captured in an InGaAs quantum dot with a fidelity F>99% by applying a magnetic field parallel to the growth direction. We s…
Phonon induced Rabi frequency renormalization of optically driven single InGaAs/GaAs quantum dots
A. J. Ramsay, T. M. Godden, S. J. Boyle +5
We study optically driven Rabi rotations of a quantum dot exciton transition between 5 and 50 K, and for pulse-areas of up to . In a high driving field regime, the decay of th…
Towards coherent optical control of a single hole spin: Rabi rotation of a trion conditional on the spin state of the hole
A. J. Ramsay, S. J. Boyle, T. M. Godden +8
A hole spin is a potential solid-state q-bit, that may be more robust against nuclear spin induced dephasing than an electron spin. Here we propose and demonstrate the sequential p…