Hybrid and scalable photonic circuit cavity quantum electrodynamics

• URL: http://arxiv.org/abs/2504.04671v1
• Date: Mon, 07 Apr 2025 01:45:28 GMT
• Title: Hybrid and scalable photonic circuit cavity quantum electrodynamics
• Authors: Xudong Wang, Yifan Zhu, Xiuqi Zhang, Yuanhao Qin, Bowen Chen, Yang Chen, Yongheng Huo, Jiaxiang Zhang, Xin Ou,
• Abstract summary: We propose and demonstrate a hybrid solid-state cQED platform integrated on a chip.<n>Our device integrates semiconducting quantum dots (QDs) with a thin-film lithium niobate microring resonator.<n>We realize a spectrally tunable hybrid photonic circuit cQED device, sustaining near-constant Purcell factors of 1.89 over a 0.30 nm spectral range.
• Score: 16.881676658514966
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Similar to superconducting circuit quantum electrodynamics (cQED), the development of a photonic analog--specifically, photonic circuit cQED--has become a major focus in integrated quantum photonics. Current solid-state cQED devices, however, face scalability challenges due to the difficulty in simultaneously spectral tuning of cavity modes and quantum emitters while ensuring in-plane optical modes confinement for efficient on-chip light routing. Here, we overcome these limitations by proposing and demonstrating a hybrid solid-state cQED platform integrated on a chip. Our device integrates semiconducting quantum dots (QDs) with a thin-film lithium niobate (TFLN) microring resonator. Leveraging TFLN's ferroelectric and electro-optic (EO) properties, we implement local spectral tuning of both waveguide-coupled QDs and cavity modes. This approach achieves a broad spectral tuning range of up to 4.82 nm for individual QDs, enabling deterministic on-chip single-photon emission with a Purcell factor of 3.52. When combined with EO cavity tuning, we realize a spectrally tunable hybrid photonic circuit cQED device, sustaining near-constant Purcell factors of 1.89 over a 0.30 nm spectral range. This achievement enables scalable on-chip cavity-enhanced single-photon sources while preserving optical properties and maintaining compatibility with advanced photonic architectures, marking a significant step toward practical implementation of large-scale chip-based quantum networks.

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