Quantum Nanophotonic Interface for Tin-Vacancy Centers in Thin-Film Diamond

• URL: http://arxiv.org/abs/2511.05740v1
• Date: Fri, 07 Nov 2025 21:56:42 GMT
• Title: Quantum Nanophotonic Interface for Tin-Vacancy Centers in Thin-Film Diamond
• Authors: Hope Lee, Hannah C. Kleidermacher, Abigail J. M. Stein, Hyunseok Oh, Lillian B. Hughes Wyatt, Casey K. Kim, Luca Basso, Andrew M. Mounce, Yongqiang Wang, Shei S. Su, Michael Titze, Ania C. Bleszynski Jayich, Jelena Vučković,
• Abstract summary: We report a quantum photonic interface for SnV- centers based on one-dimensional photonic crystal cavities fabricated in diamond thin films.<n>We observe quality factors up to 6000 across this sample, and measure up to a 12-fold lifetime reduction.
• Score: 5.699268708873852
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The negatively charged tin-vacancy center in diamond (SnV-) is an excellent solid state qubit with optically-addressable transitions and a long electron spin coherence time at elevated temperatures. However, implementing scalable quantum nodes with high-fidelity optical readout of the electron spin state requires efficient photon emission and collection from the system. In this manuscript, we report a quantum photonic interface for SnV- centers based on one-dimensional photonic crystal cavities fabricated in diamond thin films. Furthermore, we develop a model describing the spontaneous emission dynamics of our system, allowing for rigorous determination of Purcell factors and the C/D branching ratio from cavity enhancement of the C and D transitions of the SnV- zero phonon line. We observe quality factors up to ~6000 across this sample, and measure up to a 12-fold lifetime reduction. By considering the lifetime reduction of both the C and D transitions independently, we determine the C/D branching ratio to be {\eta}BR=0.7815, in line with previous theoretical and experimental findings. Finally from our analysis, we extract a Purcell factor of up to Fc=26.21(0.01) for a single SnV- transition.

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