118 citations · 514 across the 13 of their papers we have counts for
13 papers
Effect of Interactions on Vortices in a Non-equilibrium Polariton Condensate
D. N. Krizhanovskii, D. M. Whittaker, R. A. Bradley +9
We demonstrate the creation of vortices in a macroscopically occupied polariton state formed in a semiconductor microcavity. A weak external laser beam carrying orbital angular mom…
Vortex stability and permanent flow in nonequilibrium polariton condensates
G. Tosi, D. Sanvitto, M. Baudisch +6
We study the effects of imprinting a single-quantized vortex on the steady state of a microcavity exciton-polariton condensate generated via parametric scattering. Interestingly we…
Exciton-polariton condensation in a natural two dimensional trap
D. Sanvitto, A. Amo, L. Vina +3
Bose Einstein condensation of exciton-polaritons has recently been reported in homogeneous structures only affected by random in-plane fluctuations. We have taken advantage of the…
Control of non-Markovian effects in the dynamics of polaritons in semiconductor microcavities
F. J. Rodriguez, L. Quiroga, C. Tejedor +3
We report on time-resolved photoluminescence from semiconductor microcavities showing that an optically controllable mechanism exists to turn on and off memory effects in a polarit…
Pauli blockade of the electron spin flip in bulk GaAs
A. Amo, L. Vina, P. Lugli +3
By means of time-resolved optical orientation under strong optical pumping, the k-dependence of the electron spin-flip time (t_sf) in undoped GaAs is experimentally determined. t_s…
Interplay of the exciton and electron-hole plasma recombination on the photoluminescence dynamics in bulk GaAs
A. Amo, M. D. Martin, L. Vina +2
We present a systematic study of the exciton/electron-hole plasma photoluminescence dynamics in bulk GaAs for various lattice temperatures and excitation densities. The competition…
Influence of Trapping on the Exciton Dynamics of Al_xGa_1-xAs Films
A. Amo, M. D. Martin, L. Klopotowski +3
We present a systematic study on the exciton relaxation in high purity AlGaAs epilayers. The time for the excitonic photoluminescence to reach its maximum intensity (t_max) shows a…
Polarization Control of the Non-linear Emission on Semiconductor Microcavities
M. D. Martin, G. Aichmayr, L. Vina +1
The degree of circular polarization () of the non-linear emission in semiconductor microcavities is controlled by changing the exciton-cavity detuning. The polariton relaxatio…
Carrier and Light Trapping in Graded Quantum Well Laser Structures
G. Aichmayr, M. D. Martin, H. van der Meulen +6
We investigated the carrier and light trapping in GaInAs/AlGaAs single quantum well laser structures by means of time resolved photoluminescence and Raman spectroscopy. The influen…
Spin Dynamics of Cavity Polaritons
M. D. Martin, L. Vina, J. K. Son +1
We have studied polariton spin dynamics in a GaAs/AlGaAs microcavity by means of polarization- and time-resolved photoluminescence spectroscopy as a function of excitation density…
Spin relaxation in low-dimensional systems
L. Vina
We review some of the newest findings on the spin dynamics of carriers and excitons in GaAs/GaAlAs quantum wells. In intrinsic wells, where the optical properties are dominated by…
Electric-Field Tuning of Spin-Dependent Exciton-Exciton Interactions in Coupled Quantum Wells
G. Aichmayr, M. Jetter, L. Vina +3
We have shown experimentally that an electric field decreases the energy separation between the two components of a dense spin-polarized exciton gas in a coupled double quantum wel…
Spin splitting in a polarized quasi-two-dimensional exciton gas
L. Vina, L. Munoz, E. Perez +3
We have observed a large spin splitting between "spin" and heavy-hole excitons, having unbalanced populations, in undoped GaAs/AlAs quantum wells in the absence of any ex…