Year: 2025
Type: article
Abstract: Developing microwave electric field sensing based on Rydberg atoms has received significant attention due to its unique advantages. However, achieving effective coupling between Rydberg atoms and the microwave electric field in the sensing process is a challenging problem that greatly impacts the sensitivity. To address this, we propose using a microwave resonant cavity to enhance the effective coupling between the Rydberg atoms and the microwave electric field. In our experiment, Rydberg atoms are prepared via a three-photon excitation scheme, and the electric fields are measured without and with a microwave cavity in which the vapor cell is placed inside, respectively. As a result, we achieved an 18 dB enhancement of power sensitivity by adding the cavity, which is an effective enhancement in electric field pulse signal detection. This experimental testing 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.
Source: Chinese Physics Letters
Authors: Bang Liu, Li-Hua Zhang, Qi-Feng Wang, Yu Ma, Tian-Yu Han, Zong-Kai Liu, Zheng-Yuan Zhang, Shi-Yao Shao, Jun Zhang, Qing Li, Han-Chao Chen, Yu-Long Han, Dong-Sheng Ding, Bao-Sen Shi
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4409237910