Cavity-enhanced Rydberg atom microwave receiver
Abstract
Developing microwave electric field sensing based on Rydberg atom has received significant attention due to its unique advantages. However, achieving effective coupling between Rydberg atom and the microwave electric field in the sensing process is a challenging problem that greatly impacts the sensitivity. To address this, we propose the use of a microwave resonant cavity to enhance the effective coupling between the Rydberg atoms and the microwave electric field. In our experiment, we use a three-photon excitation scheme to prepare Rydberg atoms, make measurements of electric fields without and with a microwave cavity in which the vapor cell is put inside. Through experimental testing, we achieve an 18 dB enhancement of power sensitivity. The experiment shows an effective enhancement in electric field pulse signal detection. This result provides a promising direction for enhancing the sensitivity of Rydberg atomic electric field sensors and paves the way for their application in precision electric field measurements.
Cite
@article{arxiv.2404.06915,
title = {Cavity-enhanced Rydberg atom microwave receiver},
author = {Bang Liu and Li-Hua Zhang and Zong-Kai Liu and Qi-Feng Wang and Yu Ma and Tian-Yu Han and Zheng-Yuan Zhang and Shi-Yao Shao and Jun Zhang and Qing Li and Han-Chao Chen and Dong-Sheng Ding and Bao-Sen Shi},
journal= {arXiv preprint arXiv:2404.06915},
year = {2024}
}