110 citations · 292 across the 8 of their papers we have counts for
8 papers
Dynamic vibronic coupling in InGaAs quantum dots
A. J. Brash, L. M. P. P. Martins, A. M. Barth +7
The electron-phonon coupling in self-assembled InGaAs quantum dots is relatively weak at low light intensities, which means that the zero-phonon line in emission is strong compared…
Ultrafast Depopulation of a Quantum Dot by LA-phonon-assisted Stimulated Emission
F. Liu, L. M. P. Martins, A. J. Brash +5
We demonstrate ultrafast incoherent depopulation of a quantum dot from above to below the transparency point using LA-phonon-assisted emission stimulated by a redshifted laser puls…
High-fidelity initialization of long-lived quantum dot hole spin qubits by reduced fine-structure splitting
Alistair J. Brash, Luis M. P. P. Martins, Feng Liu +4
We demonstrate an on-demand hole spin qubit initialization scheme meeting four key requirements of quantum information processing: fast initialization (1/e ~ 100 ps), high fidelity…
Phonon-assisted population inversion of a single quantum dot
J. H. Quilter, A. J. Brash, F. Liu +6
We demonstrate an approach to realize the population inversion of a single InGaAs/GaAs quantum dot, which is driven by a laser pulse tuned within the neutral exciton phonon sideban…
Enhanced photocurrent readout for a quantum dot qubit by bias modulation
J. H. Quilter, R. J. Coles, A. J. Ramsay +2
We demonstrate coherent control of a quantum dot exciton using photocurrent detection with a sinusoidal reverse bias. Optical control is performed at low bias, where tunneling-limi…
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…
Polarization bistability and resultant spin rings in semiconductor microcavities
D. Sarkar, S. S. Gavrilov, M. Sich +7
The transmission of a pump laser resonant with the lower polariton branch of a semiconductor microcavity is shown to be highly dependent on the degree of circular polarization of t…