High-efficiency vertical emission spin-photon interface for scalable quantum memories

• URL: http://arxiv.org/abs/2503.20111v1
• Date: Tue, 25 Mar 2025 23:25:33 GMT
• Title: High-efficiency vertical emission spin-photon interface for scalable quantum memories
• Authors: Siavash Mirzaei-Ghormish, Jeddy Bennet, Ryan M. Camacho,
• Abstract summary: We present an efficient spin-photon interface for free-space vertical emission coupling.<n>Using a digital twin approach, we show that our design achieves a far-field collection efficiency of 96% at the numerical aperture of 0.7.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We present an efficient spin-photon interface for free-space vertical emission coupling. Using a digital twin approach, we show that our design achieves a far-field collection efficiency of 96\% at the numerical aperture of 0.7 with a 95\% overlap to a Gaussian mode. Our approach is based on a dual perturbation layer design. The first perturbation layer extracts and redirects the resonant mode of a diamond microdisk resonator around the optical axis. The second perturbation layer suppresses side lobes and concentrates most of the light intensity near the center. This dual-layer design enhances control over the farfield pattern and also reduces alignment sensitivity. Additionally, the implemented digital twin performs calculations \( 7 \times 10^6 \) times faster than full-wave FDTD simulations. These features make the design promising for quantum information applications.

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