Atomic magnetometer with microfabricated vapor cells based on coherent population trapping

• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（3）
• 所属期刊栏目: GENERAL
• 页码范围: 240-245
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/1674-1056/abc2b9

摘要

An atomic magnetometer based on coherent population trapping(CPT)resonances in microfabricated vapor cells is demonstrated.Fabricated by the micro-electro-mechanical-system(MEMS)technology,the cells are filled with Rb and Ne at a controlled pressure.An experimental apparatus is built for characterizing properties of microfabricated vapor cells via the CPT effects.The typical CPT linewidth is measured to be about 3 kHz(1.46 kHz with approximately zero laser intensity)for the rubidium D1 line at about 90 ℃.The effects of pressure,temperature and laser intensity on CPT linewidth are studied experimentally.A closed-loop atomic magnetometer is finally finished with a sensitivity of 210.5 pT/Hz1/2 at 1 Hz bandwidth.This work paves the way for developing an integrated chip-scale atomic magnetometer in the future.