A read-out enhancement for microwave electric field sensing with Rydberg atoms

J. P. Shaffer; H. Kübler

doi:10.1117/12.2309386

21 May 2018 A read-out enhancement for microwave electric field sensing with Rydberg atoms

J. P. Shaffer, H. Kübler

Proceedings Volume 10674, Quantum Technologies 2018; 106740C (2018) https://doi.org/10.1117/12.2309386
Event: SPIE Photonics Europe, 2018, Strasbourg, France

Abstract

We have shown that Rydberg atoms can be used for high-sensitivity, absolute sensing of radio frequency (RF) electric fields. We achieved a sensitivity of 3 μVcm^-1Hz^-1/2 for two read-out strategies. Results using a Mach-Zehnder interferometer2 and frequency modulated spectroscopy both achieve similar photon shot noise limited sensitivity. Fundamental limits to the sensitivity of the Rydberg atom-based RF electric field sensing have been addressed. Depending on the spectral resolution of the read-out, either the RF induced transmission line frequency splitting, the Autler-Townes regime, or a change in the on-resonant absorption, the amplitude regime, can be used to determine the RF electric field. Here, we present theoretical results of a 3-photon read-out scheme which enables the Autler-Townes regime of Rydberg atom-based RF electrometry to be extended to lower RF electric field strengths. We show that the residual Doppler shifts can, in principle, be reduced to ~11.8 kHz, on the order of the Rydberg atom natural lindewidths, using the approach.

Citation Download Citation

J. P. Shaffer and H. Kübler "A read-out enhancement for microwave electric field sensing with Rydberg atoms", Proc. SPIE 10674, Quantum Technologies 2018, 106740C (21 May 2018); https://doi.org/10.1117/12.2309386

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