Quantum Dots
Telecom Quantum Dot Spin-Photon Interface
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7 min
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Researchers engineered InAs/InAlGaAs quantum dots in circular Bragg gratings emitting at 1.55 μm, placing the system in the telecom band. They quantified electron and hole g-factors and tracked hole spin dynamics using two-photon correlations.
Key Finding: The system achieved more than 20 ns of hole spin coherence at B = 20 mT, representing a significant advance for telecom-compatible quantum qubits.
Why It Matters
The work enables long-lived spin qubits directly compatible with fiber networks, creating a potential pathway toward scalable quantum communication and quantum-network technologies.