计量学报2025，Vol.46Issue(5)：621-628,8.DOI:10.3969/j.issn.1000-1158.2025.05.01
冷原子光栅芯片的优化方法
Optimization Methods for Cold-atom Grating Chip
摘要
Abstract
Magneto-optical trap(MOT)technology confines atoms by exciting σ+and σ-transitions.However,in traditional grating magneto-optical traps(GMOT),limitations arise due to the uneven distribution of the force field acting on the atoms and the impact of polarization errors in the zeroth-order light on the atomic force.To address these issues,a novel grating chip design is proposed.The chip integrates a quarter-wave plate mirror internally,while the external structure consists of a conventional diffraction grating.After reflecting off the internal quarter-wave plate mirror,the incident light is converted into pure circular polarization aligned with the polarization direction of the incoming light.The external incident light undergoes diffraction through the grating.This design enhances the atomic force within the MOT and effectively eliminate the interference from zeroth-order light in the diffracted beam on the optical molasses.Calculations indicate that the new grating chip improves the maximum capture velocity by approximately 1.4 m/s compared to the traditional grating chip.关键词
量子计量学/时间频率计量/光栅芯片/冷原子/光栅设计/受力分析/磁光阱Key words
quantum metrology/time-frequency metrology/grating chip/cold atom/grating design/force analysis/magneto-optical trap引用本文复制引用
李慕名,魏世明,屈继峰,段俊毅,周亚东..冷原子光栅芯片的优化方法[J].计量学报,2025,46(5):621-628,8.基金项目
国家重点研发计划(2021YFF0603701) （2021YFF0603701）
国家自然科学基金(12273087) （12273087）
