Large-scale characterization of color centers in diamond through automated photoluminescence excitation measurements

Invited Talk

Spectrally indistinguishable single-photon emitters are a fundamental requirement for generating entanglement in photonic quantum networks. Identifying such emitters demands precise knowledge of their optical transition frequencies and linewidths.
We demonstrate a scalable characterization approach for color centers in diamond based on automated photoluminescence-excitation (PLE) spectroscopy. A large-scale characterization capability can be enabled by full automation of the experimental control, including tuning of a continuous-wave laser with MHz frequency precision. By exciting a large field of view rather than addressing individual emitters, the overall characterization throughput can be significantly enhanced. Using this technique, we investigate the spectral homogeneity of tin-vacancy centers in diamond. This method enables identification of spectrally indistinguishable emitters for deterministic integration into quantum devices and is applicable to various solid-state platforms, paving the way for scalable on-chip quantum-photonic architectures.

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