GaP-Diamond Hybrid Platform Enhances Quantum Light-Matter Interactions
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On October 15, the Optica news center reported that researchers fabricated nanophotonic cavities in gallium phosphide (GaP) thin films on a carrier using electron-beam lithography. After screening through spectroscopic testing, the cavities were integrated onto a diamond substrate via stamp transfer, enhancing quantum optical interactions with color centers and achieving cooperativity greater than 1 in experiments. On October 18, Phys.org further reported that the platform enabled controllable interactions between photons and diamond silicon-vacancy (SiV) centers. The team produced more than 600 nanophotonic cavities by stamp transfer with a yield of 99.5%, obtained a spin relaxation time exceeding 0.4 milliseconds, and achieved single-shot readout of SiV electron spins. The team plans to connect multiple devices on the same chip and demonstrate entanglement.
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- Phys.org Optics & PhotonicsPicksHybrid Diamond Chip Enhances Light-Qubit Interaction
Researchers have developed and demonstrated a GaP-on-diamond hybrid nanophotonic platform enabling controlled interaction between photons and silicon-vacancy (SiV) centers in diamond. Using stamp transfer, the team fabricated more than 600 nanophotonic cavities on a diamond substrate with a yield of 99.5%, achieving cooperativity above 1 and a spin relaxation time exceeding 0.4 milliseconds, enabling single-shot readout of SiV electron spins. Next steps include connecting multiple devices on the same chip and demonstrating entanglement.
- Optica News CenterPicksGallium Phosphide-Diamond Hybrid Platform Enhances Quantum Light-Matter Interaction
Researchers integrated gallium phosphide (GaP) nanophotonic cavities onto a diamond substrate using a stamp transfer process, enhancing quantum optical interaction with diamond color centers. The devices are first fabricated by electron-beam lithography in a GaP thin film on a carrier, screened by spectroscopic testing, and then transferred. Experiments achieved cooperativity above 1. The platform can serve as a light-matter interface in quantum networks.
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