Microwave Field Trap-Loss Spectroscopy of Ultracold Cs Rydberg Atoms for Electric Field Sensing
Recently, our research group has made significant progress in monitoring the interaction between microwave fields and Rydberg atoms. The related research findings have been published in Optics Express under the title "Trap loss spectroscopy of ultra-cold Rydberg atoms involved in microwave fields". Dr. Yifei Cao from our group served as the first author of the paper, with Professor Linjie Zhang as the corresponding author. Associate Professor Hao Zhang, Professor Liantuan Xiao, and Professor Suotang Jia all contributed to this research work.
This study systematically investigates the interaction mechanisms between microwave fields and multi-level transitions through trap-loss spectroscopy of ultracold cesium Rydberg atoms. By combining circularly polarized light with microwave field manipulation, we reveal a composite broadening effect dominated by laser power broadening (accounting for 83% of the total), while also observing a square-root power dependence of broadening in weak fields and linear-power-dependent doublet splitting in strong fields. These findings not only deepen our understanding of Rydberg atom-microwave coupling dynamics, but also establish a novel real-time microwave electric field detection technique based on spectral analysis, providing new tools for precision measurement and quantum control.
