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arXiv · 2107.06367

Optical Charge Injection and Full Coherent Control of Spin-Qubit in the Telecom C-band Emitting Quantum Dot

Łukasz Dusanowski·Cornelius Nawrath·Simone L. Portalupi·Michael Jetter·Tobias Huber·Sebastian Klembt·Peter Michler·Sven Höfling
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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 a new 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 new solid-state spin-qubit platform compatible with preexisting optical fibre networks.

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Łukasz Dusanowski, Cornelius Nawrath, Simone L. Portalupi, Michael Jetter, Tobias Huber, Sebastian Klembt, Peter Michler, Sven Höfling. 2021-07-13. Optical Charge Injection and Full Coherent Control of Spin-Qubit in the Telecom C-band Emitting Quantum Dot. https://doi.org/10.1038/s41467-022-28328-2

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