Fast spin rotations and optically controlled geometric phases in a quantum dot (2009)
Kim, Erik D., Truex, Katherine, Xu, Xiaodong, Sun, Bo, Steel, D. G., Bracker, A. S., ...
We demonstrate arbitrary rotations of an electron spin qubit in a charge-tunable InAs quantum dot using a combination of circularly polarized picosecond optical pulses and spin precession about a...
Hole Spin Mixing in InAs Quantum Dot Molecules (2009)
Doty, M. F., Climente, J. I., Greilich, A., Bracker, A. S., Gammon, D.
Holes confined in single InAs quantum dots have recently emerged as a promising system for the storage or manipulation of quantum information. These holes are often assumed to have only heavy-hole...
Kim, Erik D., Smirl, Katherine, Wu, Yanwen, Amo, A., Xu, Xiaodong, Steel, D. G., ...
We demonstrate the all-optical ultrafast manipulation and read-out of optical transitions in a single negatively charged self-assembled InAs quantum dot, an important step towards ultrafast control...
Electric field tunable exchange interaction in InAs/GaAs coupled quantum dots (2009)
Wijesundara, Kushal C., Garrido, Mauricio, Ramanathan, Swati, Stinaff, E. A., Scheibner, M., Bracker, A. S., ...
Spin manipulation in coupled quantum dots is of interest for quantum information applications. Control of the exchange interaction between electrons and holes via an applied electric field may...
Garrido, Mauricio, Wijesundara, Kushal C., Ramanathan, Swati, Stinaff, E. A., Scheibner, M., Bracker, A. S., ...
Excited states in single quantum dots (QDs) have been shown to be useful for spin state initialization and manipulation. For scalable quantum information processing it is necessary to have multiple...
Antibonding ground states in semiconductor artificial molecules (2008)
Doty, M. F., Climente, J. I., Korkusinski, M., Scheibner, M., Bracker, A. S., Hawrylak, P., ...
The spin-orbit interaction is a crucial element of many semiconductor spintronic technologies. Here we report the first experimental observation, by magneto-optical spectroscopy, of a remarkable...
Xu, Xiaodong, Sun, Bo, Kim, Erik D., Smirl, Katherine, Berman, P. R., Steel, D. G., ...
We investigate a singly-charged quantum dot under a strong optical driving field by probing the system with a weak optical field. When the driving field is detuned from the trion transition, the...
Cheng, Jun, Yao, Wang, Xu, Xiaodong, Steel, D. G., Bracker, A. S., Gammon, D., ...
High-resolution spectral hole burning (SHB) in coherent nondegenerate differential transmission spectroscopy discloses spin-trion dynamics in an ensemble of negatively charged quantum dots. In the...
Scheibner, M., Ponomarev, I. V., Stinaff, E. A., Doty, M. F., Bracker, A. S., Hellberg, C. S., ...
We present photoluminescence studies of the molecular neutral biexciton-exciton spectra of individual vertically stacked InAs/GaAs quantum dot pairs. We tune either the hole or the electron levels of...
Dzhioev, R. I., Korenev, V. L., Lazarev, M. V., Sapega, V. F., Gammon, D., Bracker, A. S.
We report a giant electric field induced increase of spin orientation of excitons in n-type GaAs/AlGaAs quantum well. It correlates strongly with the formation of negatively charged excitons (trions)...
Spin Fine Structure in Optically Excited Quantum Dot Molecules (2006)
Scheibner, M., Doty, M. F., Ponomarev, I. V., Bracker, A. S., Stinaff, E. A., Korenev, V. L., ...
The interaction between spins in coupled quantum dots is revealed in distinct fine structure patterns in the measured optical spectra of InAs/GaAs double quantum dot molecules containing zero, one,...
Meining, C. J., Whiteside, V. R., McCombe, B. D., Dzyubenko, A. B., Tischler, J. G., Bracker, A. S., ...
Optically detected resonance spectroscopy has been used to investigate effects of weak random lateral potential energy fluctuations on internal transitions of charged magneto-excitons (trions) in...
Vapour-phase synthesis of 2-methyl- and 4-methylquinoline over BEA* zeolites (2006)
Gammon, D, Van Laar, F, Van Steen, E
4-Methylquinoline and 2-methylquinoline were synthesized from acetaldehyde and aniline in the gas phase over BEA* zeolite catalysts. High combined yields of 2- and 4-methyl-substituted quinolines...
Polarized fine structure in the excitation spectrum of a negatively charged quantum dot (2005)
Ware, M. E., Stinaff, E. A., Gammon, D., Doty, M. F., Bracker, A. S., Gershoni, D., ...
We report polarized photoluminescence excitation spectroscopy of the negative trion in single charge tunable InAs/GaAs quantum dots. The spectrum exhibits a p-shell resonance with polarized fine...
Dutt, M. V. Gurudev, Cheng, Jun, Li, Bo, Xu, Xiaodong, Li, Xiaoqin, Berman, P. R., ...
We report on the coherent optical excitation of electron spin polarization in the ground state of charged GaAs quantum dots via an intermediate charged exciton (trion) state. Coherent optical fields...
Suppression of Dyakonov-Perel Spin Relaxation in high mobility n-GaAs (2004)
Dzhioev, R. I., Kavokin, K. V., Korenev, V. L., Lazarev, M. V., Poletaev, N. K., Zakharchenya, B. P., ...
We report a large and unexpected suppression of the free electron spin relaxation in lightly-doped n-GaAs bulk crystals. The spin relaxation rate shows weak mobility dependence and saturates at a...