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This research demonstrates a significant engineering breakthrough in quantum optics by fabricating monolithic silicon carbide metalenses that simultaneously readout two distinct spin defect types. By overcoming previous single-wavelength limitations, this dual-wavelength design streamlines optical interfaces for scalable quantum devices used in secure communication and advanced computation. The advancement directly supports the integration of diverse defect systems into practical, compact quantum hardware architectures.

Sursă care acoperăQuantum Zeitgeist

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Researchers Build Dual-Wavelength Lenses for Spin Defect Readout

Quantum Zeitgeist10 septembrie 20264 min de cititArticolul și perspectiva sunt în engleză.

Can a single lens efficiently capture light from two different quantum sources within silicon carbide? Now fabricated in bulk SiC, monolithic metalenses achieve simultaneous operation at both 860nm and 1240nm, a key step towards integrating diverse defect types into practical quantum technologies. This dual-wavelength design overcomes previous limitations requiring optimisation for only one colour centre at a time.

A silicon carbide metalens with a focal length of 495μm operates simultaneously at both 860nm and 1240nm wavelengths. Until now, monolithic SiC metalenses were optimised for single wavelength colour centres, but Xiaoying Huang and colleagues from University of Technology Sydney have achieved dual-wavelength functionality within one device. This enables efficient light collection and manipulation from nitrogen vacancy and silicon vacancy defects concurrently. The team has engineered a compact silicon carbide…

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