Dependence of Rydberg-atom-based sensor performance on different Rydberg atom populations in one atomic-vapor cell

doi:10.1088/1674-1056/ad0b04

Abstract The atomic-vapor cell is a vital component for Rydberg atomic microwave sensors, and impacts on overall capability of Rydberg sensors. However, the conventional analysis approach on effect of vapor-cell length contains two implicit assumptions, that is, the same atomic population density and buffer gas pressure, which make it unable to accurately capture actual response about effect of Rydberg-atom-based sensor performance on different Rydberg atom populations. Here, utilizing a stepped cesium atomic-vapor cell with five different dimensions at the same atomic population density and buffer gas pressure, the height and full width at half maximum of electromagnetically induced transparency (EIT) signal, and the sensitivity of the atomic superheterodyne sensor are comprehensively investigated under conditions of the same Rabi frequencies (saturated laser power). It is identified that EIT signal height is proportional to the cell length, full width at half maximum and sensitivity grow with the increment of cell length to a certain extent. Employing the coherent integration signal theory and atomic linear expansion coefficient method, theoretical analysis of the EIT height and sensitivity are further investigated. The results could shed new light on understanding and design of ultrahigh-sensitivity Rydberg atomic microwave sensors and find promising applications in quantum measurement, communication, and imaging.

Keywords: Rydberg atom population Rydberg-atom-based receiver stepped atomic-vapor cell

Received: 20 September 2023
Revised: 22 October 2023
Accepted manuscript online: 09 November 2023

PACS:	42.60.Da	(Resonators, cavities, amplifiers, arrays, and rings)
	32.80.Ee	(Rydberg states)
	42.50.Gy	(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
	84.30.Sk	(Pulse and digital circuits)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61901495 and 12104509).

Corresponding Authors: Qiang An
E-mail: anqiang18@nudt.edu.cn

Cite this article:

Bo Wu(武博), Jiawei Yao(姚佳伟), Fengchuan Wu(吴逢川), Qiang An(安强), and Yunqi Fu(付云起) Dependence of Rydberg-atom-based sensor performance on different Rydberg atom populations in one atomic-vapor cell 2024 Chin. Phys. B 33 024205

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Dependence of Rydberg-atom-based sensor performance on different Rydberg atom populations in one atomic-vapor cell

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