Functionalized mm-scale vapor cells for alkali-metal spectroscopy and magnetometry

The entry contains numerical data displayed in Figures 3 and 4 of the manuscript titled above, see arXiv preprint: https://arxiv.org/abs/2405.10715 Authors: Harini Raghavan, Michael C. D. Tayler, Kostas Mouloudakis, Rachel Rae, Sami Lähteenmäki, Rasmus Zetter, Petteri Laine, Jacques Haesler, Laurent Balet, Thomas Overstolz, Sylvain Karlen, Morgan W. Mitchell Abstract: We describe micro-fabricated rubidium vapor cells with integrated temperature-control functionality and demonstrate their suitability for use in miniaturized ultra-sensitive magnetometers. These functionalized vapor cells (FVCs) embody a dual-chamber design in low-conductivity silicon with anti-permeation coatings and micro-structured thin-film platinum surface traces as resistive heaters and temperature sensors. Thermal tests show our ability to control alkali metal distribution within the FVCs, ensuring a clean sensing chamber for optical measurements. Optical absorption spectroscopy is used to correlate the temperature readings with vapor density and to measure buffer gas pressure, of interest for optimizing sensitivity. Finally, we demonstrate zero-field resonance magnetometry with 18 fT/√Hz sensitivity in the 10 Hz to 100 Hz band, limited by laser noise and magnetic shield noise, which indicates that the functionalization does not introduce significant magnetic noise.本数据集条目包含上述题名手稿的图3与图4中展示的数值数据，详见arXiv预印本：https://arxiv.org/abs/2405.10715 作者：Harini Raghavan、Michael C. D. Tayler、Kostas Mouloudakis、Rachel Rae、Sami Lähteenmäki、Rasmus Zetter、Petteri Laine、Jacques Haesler、Laurent Balet、Thomas Overstolz、Sylvain Karlen、Morgan W. Mitchell 摘要：本文报道了集成温控功能的微加工铷蒸汽气室（rubidium vapor cells），并验证了其在微型超高灵敏度磁强计中的应用可行性。该功能化蒸汽气室（functionalized vapor cells, FVCs）采用低导热硅基底构建双腔结构，搭配防渗透涂层，并以微结构铂薄膜表面走线作为电阻式加热器与温度传感器。热测试结果表明，我们可精准调控FVCs内部的碱金属分布，为光学测量提供洁净的传感腔室。本研究通过光吸收光谱法将温度读数与蒸汽密度相关联，并测量缓冲气体压强，以优化磁强计灵敏度。最后，我们实现了10 Hz至100 Hz频段内灵敏度达18 fT/√Hz的零场共振磁强测量（zero-field resonance magnetometry），该灵敏度受限于激光噪声与磁屏蔽噪声，这一结果表明功能化处理未引入显著磁噪声。