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This study demonstrates a significant breakthrough in quantum readout efficiency by using additive solid immersion lenses to overcome internal reflection losses in diamond nitrogen-vacancy centres. The technique reduces required laser power by 33% while boosting signal saturation intensity by 63%, addressing a critical scalability barrier for practical quantum computing applications. This advancement directly enhances the performance of artificial atom-based qubits without relying on deep material embedding.

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Researchers Boost Diamond Defect Readout with 63% Efficiency Gain

Quantum Zeitgeist4 octombrie 20264 min de cititArticolul și perspectiva sunt în engleză.

A 63 per cent boost to signal strength, coupled with a simultaneous reduction of 33 per cent in required laser power, represents a substantial advance in reading quantum information from diamond defects. Previously, efficient readout necessitated deeply embedding these colour centres within the material, limiting scalability. Now, additive solid immersion lenses offer enhanced light extraction from shallow implants via a streamlined fabrication technique utilising pulsed laser deposition and photolithography.

Enhanced light extraction from nitrogen-vacancy centres in diamond is achieved through additive solid immersion lenses at Felix Bloch Institute and SaxonQ. Previously limited by low photon collection efficiency due to internal reflection, a scalable method for fabricating these lenses from yttria-stabilised-zirconia via pulsed laser deposition and photolithography now exists. The team developed tiny lenses, known as solid immersion lenses, fabricated from yttria-stabilised-zirconia to improve signal collection from defects within diamonds used for quantum computing. These additive…

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