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Allan S. Bracker
Researcher at United States Naval Research Laboratory
Publications - 155
Citations - 5202
Allan S. Bracker is an academic researcher from United States Naval Research Laboratory. The author has contributed to research in topics: Quantum dot & Exciton. The author has an hindex of 33, co-authored 148 publications receiving 4779 citations. Previous affiliations of Allan S. Bracker include United States Department of the Navy & University of California, San Diego.
Papers
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Journal ArticleDOI
Optical Signatures of Coupled Quantum Dots
Eric Stinaff,Michael Scheibner,Allan S. Bracker,Ilya Ponomarev,Vladimir L. Korenev,Morgan E. Ware,Matthew F. Doty,Thomas L. Reinecke,Daniel Gammon +8 more
TL;DR: Coulomb interactions shift the molecular resonance of the optically excited state (charged exciton) with respect to the ground state (single charge), enabling light-induced coupling of the quantum dots.
Journal ArticleDOI
Coherent optical spectroscopy of a strongly driven quantum dot.
Xiaodong Xu,Bo Sun,Bo Sun,Bo Sun,Paul R. Berman,Paul R. Berman,Paul R. Berman,Duncan G. Steel,Duncan G. Steel,Duncan G. Steel,Allan S. Bracker,Allan S. Bracker,Allan S. Bracker,Daniel Gammon,Daniel Gammon,Daniel Gammon,L. J. Sham,L. J. Sham,L. J. Sham +18 more
TL;DR: It is shown that, like single-atom or single-molecule two- and three-level quantum systems, single semiconductor quantum dots can also exhibit interference phenomena when driven simultaneously by two optical fields.
Journal ArticleDOI
Fast spin state initialization in a singly charged InAs-GaAs quantum dot by optical cooling.
Xiaodong Xu,Yanwen Wu,Bo Sun,Qiong Huang,Jun Cheng,Duncan G. Steel,Allan S. Bracker,Daniel Gammon,Clive Emary,L. J. Sham +9 more
TL;DR: This work demonstrates fast spin state initialization with near unity efficiency in a singly charged quantum dot by optically cooling an electron spin by exploiting the spontaneous decay rate of the excited state.
Journal ArticleDOI
Optical pumping of the electronic and nuclear spin of single charge-tunable quantum dots.
Allan S. Bracker,Eric Stinaff,Daniel Gammon,Morgan E. Ware,Joseph G. Tischler,Andrew Shabaev,Al. L. Efros,Doewon Park,David Gershoni,V. L. Korenev,I. A. Merkulov +10 more
TL;DR: The Overhauser effect in a high longitudinal magnetic field is used to demonstrate efficient optical pumping of nuclear spins for all three charge states of the quantum dot.
Journal ArticleDOI
Stimulated and spontaneous optical generation of electron spin coherence in charged GaAs quantum dots.
M. V. Gurudev Dutt,Jun Cheng,Bing Li,Xiaodong Xu,Xiaoqin Li,Paul R. Berman,Duncan G. Steel,Allan S. Bracker,Daniel Gammon,Sophia E. Economou,Ren-Bao Liu,L. J. Sham +11 more
TL;DR: It is shown that the Raman spin coherence in the quantum beats is caused not only by the usual stimulated Raman interaction but also by simultaneous spontaneous radiative decay of either excited trion state to a coherent combination of the two spin states.