{"id":198521,"date":"2025-09-04T03:28:07","date_gmt":"2025-09-04T03:28:07","guid":{"rendered":"https:\/\/www.europesays.com\/us\/198521\/"},"modified":"2025-09-04T03:28:07","modified_gmt":"2025-09-04T03:28:07","slug":"quantum-emitter-discovery-in-diamonds-enables-a-new-type-of-coupling","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/us\/198521\/","title":{"rendered":"Quantum emitter discovery in diamonds enables a new type of coupling"},"content":{"rendered":"

\"CCNY<\/p>\n

An NV-hosting nanodiamond on an AFM tip probes a topological waveguide. Suppressing RCP emission at 710 nm reveals regions supporting chiral modes (fringes in right image). Credit: Carlos Meriles<\/p>\n

Researchers at The City College of New York have shown how a quantum emitter, the nitrogen-vacancy (NV) center in diamond, interacts in unexpected ways with a specially engineered photonic structure when moved around with a scanning tip.<\/p>\n

The study, led by Carlos A. Meriles\u2014Martin and Michele Cohen Professor of Physics in the Division of Science\u2014and titled “Emission of Nitrogen\u2013Vacancy Centres in Diamond Shaped by Topological Photonic Waveguide Modes,” appears<\/a> in the journal Nature Nanotechnology.<\/p>\n

What has long been considered a drawback of the NV center\u2014its broad and messy emission spectrum\u2014turns out to enable a new type of coupling that reshapes its light in ways not seen before. This discovery has fundamental importance for quantum information technologies<\/a>, since such coupling could help overcome longstanding challenges like spectral diffusion and open pathways toward robust spin\u2013photon and spin\u2013spin entanglement on a chip.<\/p>\n

At the same time, the work demonstrates a novel sensing capability: by analyzing the NV emission, the team could reconstruct detailed, polarization-resolved images of the photonic modes with remarkable contrast.<\/p>\n

“Beyond photonic structures, this polarization sensitivity could eventually be applied to detecting chiral molecules, which are central to biology and medicine,” said Meriles.<\/p>\n

He added that follow-up research will continue in both directions\u2014probing quantum emitter\u2013structure interactions more deeply and developing new sensing applications based on the same principles.<\/p>\n

More information:<\/strong>
\n\t\t\t\t\t\t\t\t\t\t\t\tRaman Kumar et al, Emission of nitrogen\u2013vacancy centres in diamond shaped by topological photonic waveguide modes, Nature Nanotechnology (2025). DOI: 10.1038\/s41565-025-02001-3<\/a><\/p>\n

\n\t\t\t\t\t\t\t\t\t\t\t\t\tProvided by
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tCity College of New York<\/a>
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/p>\n

\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/p>\n

\n\t\t\t\t\t\t\t\t\t\t\t\tCitation<\/strong>:
\n\t\t\t\t\t\t\t\t\t\t\t\tQuantum emitter discovery in diamonds enables a new type of coupling (2025, September 3)
\n\t\t\t\t\t\t\t\t\t\t\t\tretrieved 3 September 2025
\n\t\t\t\t\t\t\t\t\t\t\t\tfrom https:\/\/phys.org\/news\/2025-09-quantum-emitter-discovery-diamonds-enables.html\n\t\t\t\t\t\t\t\t\t\t\t <\/p>\n

\n\t\t\t\t\t\t\t\t\t\t\t This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
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