Enhanced Quantum Magnetometry with a Femtosecond Laser-Written Integrated Photonic Diamond Chip

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-04-21 DOI:10.1021/acs.nanolett.5c00148

Yanzhao Guo, Giulio Coccia, Vinaya Kumar Kavatamane, Argyro N. Giakoumaki, Anton N. Vetlugin, Roberta Ramponi, Cesare Soci, Paul E. Barclay, John P. Hadden, Anthony J. Bennett, Shane M. Eaton

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Abstract

Ensemble negatively charged nitrogen-vacancy centers in diamond are promising quantum sensors. To optimize their sensitivity, it is crucial to increase the number of spins sampled and maximize their coupling to the detection system without degrading their spin properties. In this paper, we demonstrate enhanced quantum magnetometry via a buried laser-written waveguide in diamond with 4.5 ppm nitrogen-vacancy centers. The waveguide-coupled nitrogen-vacancy centers exhibit spin coherence properties comparable to those of nitrogen-vacancy centers in pristine diamond. Waveguide-enhanced magnetic field sensing is demonstrated in a fiber-coupled integrated photonic chip, where probing an increased volume of high-density spins results in 63 pT·Hz^–1/2 of DC magnetic field sensitivity and 20 pT·Hz^–1/2 of AC magnetic field sensitivity. This on-chip sensor realizes at least an order of magnitude improvement in sensitivity compared to the conventional confocal detection setup, paving the way for high-sensitivity quantum magnetometry with nitrogen-vacancy ensembles.

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用飞秒激光写入集成光子金刚石芯片增强量子磁强计

金刚石中的集合负电荷氮空穴是一种很有前途的量子传感器。要优化其灵敏度，关键是要增加采样的自旋数量，并在不降低其自旋特性的情况下最大限度地提高它们与检测系统的耦合。在本文中，我们通过在含有 4.5 ppm 氮空位中心的金刚石中埋入激光写入波导，展示了增强型量子磁力计。波导耦合氮空位中心的自旋相干特性与原始金刚石中的氮空位中心相当。在光纤耦合集成光子芯片中演示了波导增强磁场传感，通过探测增加的高密度自旋体积，实现了 63 pT-Hz-1/2 的直流磁场灵敏度和 20 pT-Hz-1/2 的交流磁场灵敏度。与传统的共焦探测装置相比，这种片上传感器的灵敏度至少提高了一个数量级，为氮空位团的高灵敏度量子磁测量铺平了道路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.