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arXiv · 2202.08954

Rydberg atom-based field sensing enhancement using a split-ring resonator

Christopher L. Holloway·Nikunjkumar Prajapati·Alexandra B. Artusio-Glimpse·Samuel Berweger·Yoshiaki Kasahara·Andrea Alu·Richard W. Ziolkowski
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Abstract

We investigate the use of a split-ring resonator (SRR) incorporated with an atomic-vapor cell to improve the sensitivity and the minimal detectable electric (E) field of Rydberg atom-based sensors. In this approach, a sub-wavelength SRR is placed around an atomic vapor-cell filled with cesium atoms for E-field measurements at 1.3~GHz. The SRR provides a factor of 100 in the enhancement of the E-field measurement sensitivity. Using electromagnetically induced transparency (EIT) with Aulter-Townes splitting, E-field measurements down to 5~mV/m are demonstrated with the SRR, while in the absence of the SRR, the minimal detectable field is 500~mV/m. We demonstrate that by combining EIT with a heterodyne Rydberg atom-based mixer approach, the SRR allows for the a sensitivity of 5.5~$\mu$V/m$\sqrt{{\rm Hz}}$, which is two-orders of magnitude improvement in sensitivity than when the SRR is not used.

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Christopher L. Holloway, Nikunjkumar Prajapati, Alexandra B. Artusio-Glimpse, Samuel Berweger, Yoshiaki Kasahara, Andrea Alu, Richard W. Ziolkowski. 2022-02-18. Rydberg atom-based field sensing enhancement using a split-ring resonator. https://doi.org/10.1063/5.0088532

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