基于激光写入集成光子镱金刚片的增强型量子磁测
摘要
负电荷氮-空位中心在金刚石中可作为在环境条件下进行的精确量子传感器。特别是为了优化其灵敏度, 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 high-quality buried laser-written waveguide in diamond with a 4.5 ppm density of nitrogen-vacancy centers. We show that the waveguide-coupled nitrogen-vacancy centers exhibit comparable spin coherence properties as that of nitrogen-vacancy centers in pristine diamond using time-domain optically detected magnetic resonance spectroscopy. 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 pTHz of DC-magnetic field sensitivity and 20 pTHz 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 microscale sensing with nitrogen-vacancy ensembles.
引用
@article{arxiv.2502.02478,
title = {Enhanced quantum magnetometry with a laser-written integrated photonic diamond chip},
author = {Yanzhao Guo and Giulio Coccia and Vinaya Kumar Kavatamane and Argyro N. Giakoumaki and Anton N. Vetlugin and Roberta Ramponi and Cesare Soci and Paul E. Barclay and John P. Hadden and Anthony J. Bennett and Shane M. Eaton},
journal= {arXiv preprint arXiv:2502.02478},
year = {2026}
}
备注
9 pages, 3 figures, plus supplement