Three-photon Rydberg-atom-based radio-frequency sensing scheme with narrow linewidth
Stephanie M. Bohaichuk, Fabian Ripka, Vijin Venu, Florian Christaller, Chang Liu, Matthias Schmidt, Harald Kübler, James P. Shaffer
Abstract
The self-calibration of rf sensors using Rydberg-atom vapor cells is a major advantage over conventional rf antennas, but has been limited by Doppler broadening. In this study, ultranarrow linewidths comparable to those in ultracold gases are obtained in a room-temperature vapor cell, by overcoming Doppler shifts via a three-photon scheme to reduce the spectral linewidth to less than 200 kHz. This narrow linewidth extends the self-calibrated regime of such sensors by over an order of magnitude, compared to what has been achieved in standard two-photon schemes.
Topics & Concepts
Laser linewidthDoppler effectPhotonPhysicsAtomic physicsRadio frequencyAtom (system on chip)Rydberg atomRydberg formulaCalibrationDoppler broadeningOpticsSpectral lineTelecommunicationsLaserQuantum mechanicsComputer scienceIonIonizationEmbedded systemAtomic and Subatomic Physics ResearchCold Atom Physics and Bose-Einstein CondensatesQuantum optics and atomic interactions