Work

Improving Spectral Resolution of Rydberg Atom-Based Electrometry by 2 × 2 Laser Arrays

Year: 2025

Type: article

Abstract: Rydberg atom-based electrometry based on electromagnetic induced transparency (EIT) and Autler–Townes splitting (EIT-AT) could achieve ultra-high sensitivity measurements. The amplitude and linewidth of EIT spectra significantly impact the accuracy of electric field measurements. This research utilizes cascade diffraction gratings to generate 2×2 probe laser arrays for the excitation of Rydberg atoms, thereby enhancing spectral resolution under the power broadening. Compared with one laser, the laser array boosts EIT amplitude, narrowing the linewidth from 23.53 MHz to 12.66 MHz, making EIT-AT more distinguishable under identical fields and achieving an enhancement of the sensitivity of 77.96 nV/cm/Hz. These results indicate that laser arrays can optimize the sensitivity of measurement systems based on the Rydberg EIT effect.

Source: Photonics

DOI: 10.3390/photonics12121189

Authors: Fengting Zhao, Qiang An, Jinhao Zhang, Yunqi Fu

Institution: National University of Defense Technology

Language: English

Topic: Quantum optics and atomic interactions

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,896

Funders: National Natural Science Foundation of China, Natural Science Foundation of Hainan Province