Frequency modulation of Rydberg states by radio frequency electromagnetic fields

2023/09/13 by Nabendu S. Mishra, Mishra, Nabendu S.
Physics and Astronomy · Engineering · #Quantum optics and atomic interactions #Cold Atom Physics and Bose-Einstein Condensates #Terahertz technology and applications

paper · pdf · doi:10.48550/arxiv.2309.07007

Abstract

In this work, we demonstrate the generation of sidebands in electromagnetically induced transparency (EIT) signal due to frequency modulation of Rydberg states in ⁸⁷Rb thermal vapor. An oscillating radio-frequency (RF) electric field generated through a pair of parallel-placed copper plates leads to modulation of the Rydberg state by virtue of Stark effect where the frequency and strength of the sidebands quantify the RF electric field present. The variation of the strength of the EIT peak and the sidebands with RF voltage is observed to vary as a function of the Bessel function of modulation index. It provides an estimate of the atomic polarizability in the medium, which for 54S_1/2 state, is found to be (h)⋅1.01×10⁸ Hz/(V/cm)².

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