2023/10/16 by Behary, Rob, Novikova, Irina, Mikhailov, Eugeniy +2
#Atomic Physics (physics.atom-ph) #FOS: Physical sciences #Optics (physics.optics)
paper · doi:10.48550/arxiv.2310.10615
The sensitivity of electric field sensors based on two-photon electromagnetically induced transparency (EIT) involving highly excited Rydberg states in thermal atoms is often limited by the residual Doppler effect and optical power broadening. Here, we propose a method to reduce the EIT spectral linewidth using a Ramsey interrogation approach, allowing multiple interrogations of atomic coherence, using either temporally or spatially separated laser beams. Our theoretical calculations predict that the linewidth of such Raman-Ramsey spectral features can be substantially reduced compare to a standard Doppler-broadened EIT, opening a possibility to improved sensitivity of Rydberg atomic vapor-based sensors. We also discuss some preliminary experimental efforts toward observing Raman-Ramsey resonances for both spatially and temporally separated interrogation approaches and associated technical challenges.