Radio-frequency-modulated Rydberg states in a vapor cell

Abstract

We measure strong radio-frequency (RF) electric fields using rubidium Rydberg atoms prepared in a room-temperature vapor cell as field sensors. Electromagnetically induced transparency is employed as an optical readout. We RF-modulate the 60S 1 2 and 58D 5 2 Rydberg states with 50 and 100 MHz fields, respectively. For weak to moderate RF fields, the Rydberg levels become Stark-shifted, and sidebands appear at even multiples of the driving frequency. In high fields, the adjacent hydrogenic manifold begins to intersect the shifted levels, providing rich spectroscopic structure suitable for precision field measurements. A quantitative description of strong-field level modulation and mixing of S and D states with hydrogenic states is provided by Floquet theory. Additionally, we estimate the shielding of DC electric fields in the interior of the glass vapor cell.

Line shapes and time dynamics of the Förster resonances between two Rydberg atoms in a time-varying electric field

“…Such sidebands were observed experimentally in the laser-excitation spectra of cold Rb Rydberg atoms and reported in our paper [10], as well as in several other experiments with Rydberg atoms in the vapor cells [38,39] and atomic beams [40,41]. Following Ref.…”

Atom-Based Radio-Frequency Field Calibration and Polarization Measurement Using Cesium nDJ Floquet States

“…3 (a) shows the calibrated experimental electric field, E = tE 0 = t × 0.95 × V /d, with voltage amplitude V at the source. The overall relative uncertainty of the atom-based RF-field calibration performed in this experiment is ±0.5%, similar to what has been obtained in [22] and about an order of magnitude better than in traditional RF field calibration [23,24]. The use of narrow-band coupling and probe lasers, lower Rabi frequencies, and larger-diameter laser beams is expected to reduce the uncertainty to considerably smaller values.…”

Atomic Receiver by Utilizing Multiple Radio-Frequency Coupling at Rydberg States of Rubidium

“…Rydberg atoms are some kinds of atoms with large principal quantum numbers [3]. Their large dc polarizabilities and microwave-transition dipole moments [4], Ref. [5] make them very suitable for the RF E-field measurement.…”