Self-aligned patterning technique for fabricating high-performance diamond sensor arrays with nanoscale precision

Subjects: Optics >> Quantum optics submitted time 2023-02-19

Mengqi Wang Haoyu Sun Xiangyu Ye Pei Yu Hangyu Liu Jingwei Zhou Pengfei Wang Fazhan Shi Ya Wang Jiangfeng Du

Abstract： To efficiently align the creation of defect center with photonics structure in nanoscale precision is one of the outstanding challenges for realizing high-performance photonic devices and the application in quantum technology such as quantum sensing, scalable quantum systems, and quantum computing network. Here, we propose a facile self-aligned patterning technique wholly based on conventional engineering technology, with the doping precision can reach ~15nm. Specifically, we demonstrate this technique by fabricating diamond nanopillar sensor arrays, which show high consistency and near-optimal photon counts, high yield approaching the theoretical limit, and high filtering efficiency for different NV centers. Combined with appropriate crystal orientation, a saturated fluorescence rate of 4.65 Mcps and the best reported fluorescence-dependent detection sensitivity of 1900 cps^(-1/2) are achieved. This technique applicable to all similar solid-state systems should facilitate the development of parallel quantum sensing and scalable information processing.

Peer Review Status:Awaiting Review

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