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Optical charge injection and coherent control of a quantum-dot spin-qubit emitting at telecom wavelengths.

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.

SUBMITTER: Dusanowski L

PROVIDER: S-EPMC8826386 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature

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Optical charge injection and coherent control of a quantum-dot spin-qubit emitting at telecom wavelengths.

Dusanowski Łukasz Ł Nawrath Cornelius C Portalupi Simone L SL Jetter Michael M Huber Tobias T Klembt Sebastian S Michler Peter P Höfling Sven S

Nature communications 20220208 1

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- ...[more]

PMID: 35136062

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