Erlangen 2022 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 8: Atomic systems in external fields
A 8.1: Poster
Dienstag, 15. März 2022, 16:30–18:30, P
Numerical Studies of atom-based microwave eletric field sensing in hot vapors — •Matthias Schmidt1, Fabian Ripka1, Chang Liu1, Harald Kübler1,2, and James P. Shaffer1 — 1Quantum Valley Ideas Laboratories, 485 Wes Graham Way, Waterloo, ON N2L 6R1, Canada — 25. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany
We present progress in atom-based microwave electric field sensing using Rydberg atoms in hot vapors. We find two distinct strategies to detect the electric field strength of the RF wave, namely the Autler-Townes limit, where the splitting of the dressed states is proportional to the incident RF electric field strength and the amplitude regime, where we determine the electric field by measuring the difference of transmission in the presence of the microwave. We present a simplified theoretical model where we consider the small microwave intensity as an induced detuning of the coupling laser. With this model we can analytically investigate the main contribution to the transmission signal and find a simple relation between the change of the transmission and the incident RF electric field strength. Furthermore we present a three photon excitation scheme, with which residual Doppler broadening is suppressed. This enables a spectral resolution comparable to the Rydberg state decay rate, the spectral bandwith limitation.