Related papers: Highly sensitive measurement of a megahertz rf electric field with a Rydberg-atom sensor

Highly sensitive measurement of a megahertz rf electric field with a Rydberg-atom sensor

URL: http://arxiv.org/abs/2206.06576v3
Date: Mon, 4 Jul 2022 09:09:50 GMT
Title: Highly sensitive measurement of a megahertz rf electric field with a Rydberg-atom sensor
Authors: Bang Liu, Li-Hua Zhang, Zong-Kai Liu, Zheng-Yuan Zhang, Zhi-Han Zhu, Wei Gao, Guang-Can Guo, Dong-Sheng Ding, Bao-Sen Shi
Abstract summary: We report highly sensitive measurement of a weak MHz electric field using electromagnetically induced transparency with Rydberg atoms in a thermal atomic system. We successfully measure the minimum electric field strength to be textcolorblack37.3 $mathrmmu V/cm$ with a sensitivity up to $-65$ dBm/Hz and a linear dynamic range over 65 dB.
Score: 10.888647837059887
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Rydberg atoms have great potential in electric field measurement and have an advantage with a large frequency bandwidth from the kHz to the THz scale. However, the sensitivity for measuring a weak MHz electric field signal is limited by the spectroscopic resolution, because the weak electric field induces only a small perturbation of the population and energy level shift of the Rydberg atoms. Here, we report highly sensitive measurement of a weak MHz electric field using electromagnetically induced transparency with Rydberg atoms in a thermal atomic system. Using the heterodyne method on a 30-MHz electric field, we successfully measure the minimum electric field strength to be \textcolor{black}{37.3 $\mathrm{\mu V/cm}$} with a sensitivity up to $-65$ dBm/Hz and a linear dynamic range over 65 dB. Additionally, we measure an amplitude-modulated signal and demodulate the signal with a fidelity over 98\%. This work extends the sensitivity of atomic sensors for measuring MHz electric fields, which advances atomic electric field-sensing technology.

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