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

Łukasz Dusanowski; Cornelius Nawrath; Simone L. Portalupi; Michael Jetter; Tobias Huber; Sebastian Klembt; Peter Michler; Sven Höfling

doi:10.1038/s41467-022-28328-2

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

Łukasz Dusanowski^*, Cornelius Nawrath, Simone L. Portalupi, Michael Jetter, Tobias Huber, Sebastian Klembt, Peter Michler, Sven Höfling

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Article number	748
Number of pages	8
Journal	Nature Communications
Volume	13
DOIs	https://doi.org/10.1038/s41467-022-28328-2
Publication status	Published - 8 Feb 2022

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title = "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.",

author = "{\L}ukasz Dusanowski and Cornelius Nawrath and Portalupi, \{Simone L.\} and Michael Jetter and Tobias Huber and Sebastian Klembt and Peter Michler and Sven H{\"o}fling",

note = "Funding: This work was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)-INST 93/932-1 FUGG. We acknowledge financial support by the German Ministry of Education and Research (BMBF) within the project “Q.Link.X” (FKZ: 16KIS0871 and 16KIS0862). We are furthermore grateful for the support by the State of Bavaria.",

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T1 - Optical charge injection and coherent control of a quantum-dot spin-qubit emitting at telecom wavelengths

AU - Dusanowski, Łukasz

AU - Nawrath, Cornelius

AU - Portalupi, Simone L.

AU - Jetter, Michael

AU - Huber, Tobias

AU - Klembt, Sebastian

AU - Michler, Peter

AU - Höfling, Sven

N1 - Funding: This work was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)-INST 93/932-1 FUGG. We acknowledge financial support by the German Ministry of Education and Research (BMBF) within the project “Q.Link.X” (FKZ: 16KIS0871 and 16KIS0862). We are furthermore grateful for the support by the State of Bavaria.

PY - 2022/2/8

Y1 - 2022/2/8

N2 - 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.

AB - 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.

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VL - 13

JO - Nature Communications

JF - Nature Communications

M1 - 748

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

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