Ge Yi, Li Yuhan, Li Yang, Liu Xuejing, Dong Xiangmei, Gao Xiumin
School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
Qinhuangdao Hongyan Optoelectronics Technology Co., Ltd., Qinhuangdao 066000, China.
Sensors (Basel). 2025 Jan 3;25(1):234. doi: 10.3390/s25010234.
We propose a non-magnetic transparent heating film based on silver nanowires (Ag-NWs) for application in spin-exchange relaxation-free (SERF) magnetic field measurement devices. To achieve ultra-high sensitivity in atomic magnetometers, the atoms within the alkali metal vapor cell must be maintained in a stable and uniform high-temperature environment. Ag-NWs, as a transparent conductive material with exceptional electrical conductivity, are well suited for this application. By employing high-frequency AC heating, we effectively minimize associated magnetic noise. The experimental results demonstrate that the proposed heating film, utilizing a surface heating method, can achieve temperatures exceeding 140 °C, which is sufficient to vaporize alkali metal atoms. The average magnetic flux coefficient of the heating film is 0.1143 nT/mA. Typically, as the current increases, a larger magnetic field is generated. When integrated with the heating system discussed in this paper, this characteristic can effectively mitigate low-frequency magnetic interference. In comparison with traditional flexible printed circuits (FPC), the Ag-NWs heating film exhibits a more uniform temperature distribution. This magnetically transparent heating film, leveraging Ag-NWs, enhances atomic magnetometry and presents opportunities for use in chip-level gyroscopes, atomic clocks, and various other atomic devices.
我们提出了一种基于银纳米线（Ag-NWs）的非磁性透明加热膜，用于自旋交换无弛豫（SERF）磁场测量设备。为了在原子磁力计中实现超高灵敏度，碱金属蒸汽池内的原子必须保持在稳定且均匀的高温环境中。Ag-NWs作为一种具有卓越导电性的透明导电材料，非常适合此应用。通过采用高频交流加热，我们有效地降低了相关的磁噪声。实验结果表明，所提出的加热膜采用表面加热方法，能够达到超过140°C的温度，足以汽化碱金属原子。加热膜的平均磁通系数为0.1143 nT/mA。通常，随着电流增加，会产生更大的磁场。当与本文讨论的加热系统集成时，这一特性可以有效减轻低频磁干扰。与传统的柔性印刷电路（FPC）相比，Ag-NWs加热膜具有更均匀的温度分布。这种利用Ag-NWs的磁透明加热膜增强了原子磁力测量，并为芯片级陀螺仪、原子钟和其他各种原子设备的应用提供了机会。
