Controlling the polarization eigenstate of a quantum dot exciton with light
arXiv:0903.4763 · doi:10.1103/PhysRevLett.103.086601
Abstract
We demonstrate optical control of the polarization eigenstates of a neutral quantum dot exciton without any external fields. By varying the excitation power of a circularly polarized laser in micro-photoluminescence experiments on individual InGaAs quantum dots we control the magnitude and direction of an effective internal magnetic field created via optical pumping of nuclear spins. The adjustable nuclear magnetic field allows us to tune the linear and circular polarization degree of the neutral exciton emission. The quantum dot can thus act as a tunable light polarization converter.
5 pages, 3 figures
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- Measurement of Conduction and Valence Bands g-factors in a Transition Metal Dichalcogenide Monolayer
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- Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field
- Quantum-to-Classical Correspondence and Hubbard-Stratonovich Dynamical Systems, a Lie-Algebraic Approach
- Controlling the Interaction of Electron and Nuclear Spins in a Tunnel-Coupled Quantum Dot
- General theory of feedback control of a nuclear spin ensemble in quantum dots
- Magnetic field induced valence band mixing in [111] grown semiconductor quantum dots
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- Vanishing fine structure splittings in telecom wavelength quantum dots grown on (111)A surfaces by droplet epitaxy
- Measurements of a fast nuclear spin dynamics in a single InAs quantum dot with positively charged exciton
- Dark Exciton Giant Rabi Oscillations with no External Magnetic Field