Blueprint for NV center ensemble based magnetometer: precise diamond sensor material characterization

• URL: http://arxiv.org/abs/2408.14318v2
• Date: Thu, 12 Sep 2024 15:40:54 GMT
• Title: Blueprint for NV center ensemble based magnetometer: precise diamond sensor material characterization
• Authors: Jixing Zhang, Michael Kuebler, Cheuk Kit Cheung, Magnus Benke, Mathis Brossaud, Andrej Denisenko, Jens Anders, Emilio Corcione, Cristina Tarín Sauer, Junichi Isoya, Chen Zhang, Joerg Wrachtrup,
• Abstract summary: High sensitivity in NV-based magnetic sensing requires a diamond sample with a high density of NV centers and a long electron spin dephasing time. We propose a systematic measurement method for determining the electron spin dephasing time of NV center ensembles.
• Score: 3.568187998042966
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The nitrogen-vacancy (NV) center in diamond is a promising candidate for various quantum applications, such as quantum sensing. High sensitivity in NV-based magnetic sensing requires a diamond sample with a high density of NV centers and a long electron spin dephasing time. In this work, we propose a systematic measurement method for determining the electron spin dephasing time of NV center ensembles and analyze the contributions to the dephasing time from various sources, including NV-NV interactions, strain distribution, $^{13}C$ nuclear spin, and P1 electron spin. We demonstrate the effectiveness of our method on a series of high-performance diamond samples and provide a comprehensive understanding of dephasing sources, enabling the optimization of NV-based quantum sensing applications.

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