Cao Yifei, Zhang Hao, Zhang Linjie, Xiao Liantuan, Jia Suotang
Opt Express. 2025 Feb 24;33(4):7753-7762. doi: 10.1364/OE.551138.
Trap loss spectroscopy, based on fluorescence detection, provides a real-time measurement technique that is advantageous for ultra-cold atomic systems, to monitor the interaction between microwave fields and Rydberg atoms. By employing the polarization combinations of excitation lasers and microwave fields, we achieve trap loss spectroscopy of multi-path transitions in magnetic Rydberg hyperfine states and observe Zeeman broadening. The contributions of laser power, Zeeman effect, and collision effects to the broadening of the trap loss spectrum were comprehensively analyzed. Additionally, we have observed the broadening and splitting of the trap loss spectrum in response to variations in microwave field power and frequency. The transition from broadening to splitting of the spectral profile is observed with an increase in microwave field power. The full width at half maximum (FWHM) of trap loss spectroscopy exhibited a proportional relationship with the square root of microwave power, while the peak separation demonstrated a direct proportionality with higher microwave power. Our detailed exploration of trap loss spectroscopy under microwave fields may provide what we believe to be a novel approach for microwave field sensing.
基于荧光检测的陷波损耗光谱法提供了一种实时测量技术，该技术对超冷原子系统有利，可用于监测微波场与里德堡原子之间的相互作用。通过采用激发激光和微波场的偏振组合，我们实现了磁里德堡超精细态多路径跃迁的陷波损耗光谱，并观察到塞曼展宽。综合分析了激光功率、塞曼效应和碰撞效应对陷波损耗光谱展宽的贡献。此外，我们还观察到陷波损耗光谱随微波场功率和频率变化的展宽和分裂。随着微波场功率的增加，观察到光谱轮廓从展宽到分裂的转变。陷波损耗光谱的半高全宽（FWHM）与微波功率的平方根呈正比关系，而峰值间距与更高的微波功率呈正比关系。我们对微波场下陷波损耗光谱的详细探索可能会提供一种我们认为新颖的微波场传感方法。
