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

• URL: http://arxiv.org/abs/2107.06367v1
• Date: Tue, 13 Jul 2021 20:04:33 GMT
• Title: Optical Charge Injection and Full Coherent Control of Spin-Qubit in the Telecom C-band Emitting Quantum Dot
• Authors: {\L}ukasz Dusanowski, Cornelius Nawrath, Simone L. Portalupi, Michael Jetter, Tobias Huber, Sebastian Klembt, Peter Michler and Sven H\"ofling
• Abstract summary: We propose and implement a new optically active solid-state spin-qubit based on a hole confined in a single InAs/GaAs quantum dot. Results showcase a new solid-state spin-qubit platform compatible with preexisting optical fibre networks.
• Score: 0.3078264203938487
• License: http://creativecommons.org/licenses/by/4.0/
• 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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