1. Optical charge injection and coherent control of a quantum-dot spin-qubit emitting at telecom wavelengths
- Author
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Łukasz Dusanowski, Cornelius Nawrath, Simone L. Portalupi, Michael Jetter, Tobias Huber, Sebastian Klembt, Peter Michler, and Sven Höfling
- Subjects
Computer Science::Emerging Technologies ,Multidisciplinary ,Science ,Physics::Optics ,General Physics and Astronomy ,Quantum Physics ,General Chemistry ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,Computer Science::Computers and Society ,General Biochemistry, Genetics and Molecular Biology - Abstract
Solid-state quantum emitters with manipulable spin-qubits are promising platforms for quantum communication applications. Although such light-matter interfaces could be realized in many systems only a few allow for light emission in the telecom bands necessary for long-distance quantum networks. Here, we propose and implement an optically active solid-state spin-qubit based on a hole confined in a single InAs/GaAs quantum dot grown on an InGaAs metamorphic buffer layer emitting photons in the C-band. We lift the hole spin-degeneracy using an external magnetic field and demonstrate hole injection, initialization, read-out and complete coherent control using picosecond optical pulses. These results showcase a solid-state spin-qubit platform compatible with preexisting optical fiber networks.
- Published
- 2021