Optical detection of single electron spin resonance in a quantum dot

Abstract

We demonstrate optically detected spin resonance of a single electron confined to a self-assembled quantum dot. The dot is rendered dark by resonant optical pumping of the spin with a coherent laser. Contrast is restored by applying a radio frequency (rf) magnetic field at the spin resonance. The scheme is sensitive even to rf fields of just a few micro-T. In one case, the spin resonance behaves exactly as a driven 3-level quantum system (a lambda-system) with weak damping. In another, the dot exhibits remarkably strong (67% signal recovery) and narrow (0.34 MHz) spin resonances with fluctuating resonant positions, evidence of unusual dynamic processes of non-Markovian character.

4 pages, 5 figures

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• Single-shot read-out of an individual electron spin in a quantum dot
• Driven coherent oscillations of a single electron spin in a quantum dot
• Dynamics of Quantum Dot Nuclear Spin Polarization Controlled by a Single Electron
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Cited by in corpus (4)

• Prospects for measurement-based quantum computing with solid state spins
• Optical alignment and polarization conversion of neutral exciton spin in individual InAs/GaAs quantum dots
• Quantum Criticality out of Equilibrium: Steady State in a Magnetic Single-Electron Transistor
• Hyperfine interaction in InAs/GaAs self-assembled quantum dots : dynamical nuclear polarization versus spin relaxation