Non-invasive probing of random local potential fluctuations in ZnCdSe/ZnSe quantum wells (2009)
Fuhrmann, D. A., Krenner, H. J., Wixforth, A., Curran, A., Prior, K. A., Warburton, R. J., ...
Temperature dependence and recombination behavior of trapped charge carriers in ZnCdSe/ZnSe multiple quantum wells are investigated employing surface acoustic waves. These weakly perturb the carrier...
Dressed excitonic states and quantum interference in a three-level quantum dot ladder system (2008)
Gerardot, B. D., Brunner, D., Dalgarno, P. A., Karrai, K., Badolato, A., Petroff, P. M., ...
We observe dressed states and quantum interference effects in a strongly driven three-level quantum dot ladder system. The effect of a strong coupling field on one dipole transition is measured by a...
Dalgarno, P. A., Smith, J. M., McFarlane, J., Gerardot, B. D., Karrai, K., Badolato, A., ...
We present results on the charge dependence of the radiative recombination lifetime, Tau, and the emission energy of excitons confined to single self-assembled InGaAs quantum dots. There are...
Optically probing the fine structure of a single Mn atom in an InAs quantum dot (2007)
Kudelski, A., Lemaître, A., Miard, A., Voisin, P., Graham, T. C. M., Warburton, R. J., ...
We report on the optical spectroscopy of a single InAs/GaAs quantum dot (QD) doped with a single Mn atom in a longitudinal magnetic field of a few Tesla. Our findings show that the Mn impurity is a...
Entanglement on demand through time reordering (2007)
Avron, J. E., Bisker, G., Gershoni, D., Lindner, N. H., Meirom, E. A., Warburton, R. J.
Entangled photons can be generated "on demand" in a novel scheme involving unitary time reordering of the photons emitted in a radiative decay cascade. The scheme yields polarization entangled photon...
Exciton-photon coupling in a ZnSe based microcavity fabricated using epitaxial liftoff (2007)
Curran, A., Morrod, J. K., Prior, K. A., Kar, A. K., Warburton, R. J.
We report the observation of strong exciton-photon coupling in a ZnSe based microcavity fabricated using epitaxial liftoff. Molecular beam epitaxial grown ZnSe/Zn$_{0.9}$Cd$_{0.1}$Se quantum wells...
Contrast in transmission spectroscopy of a single quantum dot (2007)
Gerardot, B. D., Seidl, S., Dalgarno, P. A., Kroner, M., Karrai, K., Badolato, A., ...
We perform transmission spectroscopy on single quantum dots and examine the effects of a resident carriers spin, the incident laser spot size, polarization, and power on the experimental contrast. We...
Manipulating exciton fine structure in quantum dots with a lateral electric field (2007)
Gerardot, B.D., Seidl, S., Dalgarno, P.A., Warburton, R.J., Granados, Daniel, García, J.M., ...
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. Stark shifts up to 1.5 meV, an increase in...
Manipulating exciton fine-structure in quantum dots with a lateral electric field (2006)
Gerardot, B. D., Seidl, S., Dalgarno, P. A., Warburton, R. J., Granados, D., Garcia, J. M., ...
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. Stark shifts up to 1.5 meV, an increase in...
A stable fiber-based Fabry-Perot cavity (2006)
Steinmetz, T., Balocchi, A., Colombe, Y., Hunger, D., Hänsch, T. W., Warburton, R. J., ...
We report the development of a fiber-based, tunable optical cavity with open access. The cavity is of the Fabry-Perot type and is formed with miniature spherical mirrors positioned on the end of...
Power-law carrier dynamics in semiconductor nanocrystals at nanosecond time scales (2006)
Sher, P. H., Smith, J. M., Dalgarno, P. A., Warburton, R. J., Chen, X., Dobson, P. J., ...
We report the observation of power law dynamics on nanosecond to microsecond time scales in the fluorescence decay from semiconductor nanocrystals, and draw a comparison between this behavior and...
Seidl, S., Kroner, M., Dalgarno, P. A., Högele, A., Smith, J. M., Ediger, M., ...
We have performed detailed photoluminescence (PL) and absorption spectroscopy on the same single self-assembled quantum dot in a charge-tunable device. The transition from neutral to charged exciton...
Absorptive and dispersive optical responses of excitons in a single quantum dot (2005)
Alén, B., Högele, A., Kroner, M., Seidl, S., Karrai, K., Warburton, R. J., ...
We have determined both the real and imaginary parts of the dielectric polarizability of a single quantum dot. The experiment is based on the observation and the manipulation of Rayleigh scattering...
Voltage-controlled electron-hole interaction in a single quantum dot (2004)
Högele, A., Seidl, S., Kroner, M., Karrai, K., Atatüre, M., Dreiser, J., ...
The ground state of neutral and negatively charged excitons confined to a single self-assembled InGaAs quantum dot is probed in a direct absorption experiment by high resolution laser spectroscopy....
Spin-selective optical absorption of singly charged excitons in a quantum dot (2004)
Högele, A., Kroner, M., Seidl, S., Karrai, K., Atatüre, M., Dreiser, J., ...
We investigate high resolution laser absorption spectroscopy of a single InGaAs/GaAs self-assembled quantum dot embedded in a field-effect structure. We show experimentally that the interband optical...
Voltage-Controlled Optics of a Quantum Dot (2004)
Högele, A., Seidl, S., Kroner, M., Karrai, K., Warburton, R. J., Gerardot, B. D., ...
We show how the optical properties of a single semiconductor quantum dot can be controlled with a small dc voltage applied to a gate electrode. We find that the transmission spectrum of the neutral...
Kondo-excitons and Auger processes in self-assembled quantum dots (2003)
Govorov, A. O., Karrai, K., Warburton, R. J., Kalameitsev, A. V.
We describe theoretically novel excitons in self-assembled quantum dots interacting with a two-dimensional electron gas in the wetting layer. In the presence of the Fermi sea, the optical lines...
Kondo excitons in self-assembled quantum dots (2002)
Govorov, A. O., Karrai, K., Warburton, R. J.
We describe novel excitons in quantum dots by allowing for an interaction with a Fermi sea of electrons. We argue that these excitons can be realized very simply with self-assembled quantum dots,...
Polarized excitons in nanorings and the `optical' Aharonov-Bohm effect (2002)
Govorov, A. O., Ulloa, S. E., Karrai, K., Warburton, R. J.
The quantum nature of matter lies in the wave function phases that accumulate while particles move along their trajectories. A prominent example is the Aharonov-Bohm phase, which has been studied in...
Magneto-optical properties of charged excitons in quantum dots (2002)
Govorov, A. O., Schulhauser, C., Haft, D., Kalameitsev, A. V., Chaplik, A., Warburton, R. J., ...
We present both experimental and theoretical results on the influence of a magnetic field on excitons in semiconductor quantum dots. We find a pronounced difference between the strong and weak...
Zero-field spin splitting in InAs-AlSb quantum wells revisited (1999)
Brosig, S., Ensslin, K., Warburton, R. J., Nguyen, C., Brar, B., Thomas, M., ...
We present magnetotransport experiments on high-quality InAs-AlSb quantum wells that show a perfectly clean single-period Shubnikov-de Haas oscillation down to very low magnetic fields. In contrast...
FLUCTUATION EFFECTS IN THE RESISTIVE TRANSITION OF THIN FILAMENTARY SUPERCONDUCTORS. (1998)
Warburton,R. J., Patton,Bruce R., Webb,W. W., Wilkins,J. W.
A progress report on new and improved measurements of the resistive transitions in tin and tin-indium alloy whisker crystals shows results that can be fitted reasonably well from the onset at low...