2011
DOI: 10.1103/physrevlett.106.040504
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Coherent Optical Writing and Reading of the Exciton Spin State in Single Quantum Dots

Abstract: We demonstrate a one-to-one correspondence between the polarization state of a light pulse tuned to neutral exciton resonances of single semiconductor quantum dots and the spin state of the exciton that it photogenerates. This is accomplished using two variably polarized and independently tuned picosecond laser pulses. The first "writes" the spin state of the resonantly excited exciton. The second is tuned to biexcitonic resonances, and its absorption is used to "read" the exciton spin state. The absorption of… Show more

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Cited by 44 publications
(89 citation statements)
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“…Therefore, there are many experimental and theoretical studies aiming at achieving this goal. 3,4,19,20 Various experimental methods are applied in these studies: polarization sensitive photoluminescence (PL) 3,4,6,21 , PL in the presence of electric 3,4 and magnetic fields 22 , and PL excitation (PLE) 5,7,23 spectroscopies, second order intensity correlation measurements 6,21 and time resolved spectroscopy 21,24 , just to mention a few. These various experimental methods, when combined with many body models, lead to a relatively good understanding of the emission spectrum of neutral 3,4,6 and charged 3,4,21 QDs.…”
Section: -18mentioning
confidence: 99%
“…Therefore, there are many experimental and theoretical studies aiming at achieving this goal. 3,4,19,20 Various experimental methods are applied in these studies: polarization sensitive photoluminescence (PL) 3,4,6,21 , PL in the presence of electric 3,4 and magnetic fields 22 , and PL excitation (PLE) 5,7,23 spectroscopies, second order intensity correlation measurements 6,21 and time resolved spectroscopy 21,24 , just to mention a few. These various experimental methods, when combined with many body models, lead to a relatively good understanding of the emission spectrum of neutral 3,4,6 and charged 3,4,21 QDs.…”
Section: -18mentioning
confidence: 99%
“…2c and d, makes it possible to develop new, original approaches to coherent electron and hole spin control. [28][29][30] The main part of this paper, Sec. III B, is devoted to a detailed microscopic model that provides quantitative evaluation of the magnetic field induced heavy-hole mixing in the Faraday geometry.…”
Section: Introductionmentioning
confidence: 99%
“…[6,7]. Figure 7(c) shows the time evolution of the x-polarization (or referred to as the H-polarization) * ) of the QD uniaxially stressed in the fixed direction with φ σ = 45…”
Section: Discussionmentioning
confidence: 99%
“…[6,7] The realization of entangled photon pair emitters based on QDs has been for a long time a challenging task because it needs to retain the degeneracy of exciton doublet states, which is however likely lift by any slight symmetry breakings of QD structure. [8][9][10][11][12] By contrast to the application of entangled photon pair generation, an efficient operation of exciton qubit gate yet needs an energy level anti-crossing in the FS that is coherently tunable so that any desired superposition states can be deterministically prepared and controlled.…”
Section: Introductionmentioning
confidence: 99%