Sensitivity Improvement and Determination of Rydberg Atom-Based Microwave Sensor

We present a theoretical and experimental investigation of the improvement and determination of the sensitivity of Rydberg atom-based microwave RF sensor. An optical Bloch equation has been set up based on the configuration that two-color cascading lasers exciting atom to highly Rydberg state and a...

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Bibliographic Details
Published in:Photonics 2022-04, Vol.9 (4), p.250
Main Authors: Cai, Minghao, Xu, Zishan, You, Shuhang, Liu, Hongping
Format: Article
Language:English
Subjects:
Antennas
Coupling
electric dipole moment
Electric fields
Lasers
Mathematical models
Microwave communications
Microwave sensors
microwave transition
Optimization
Parameter sensitivity
Receivers & amplifiers
Rydberg atoms
Rydberg states
Sensors
Simulation
Spectrum analysis
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Summary:We present a theoretical and experimental investigation of the improvement and determination of the sensitivity of Rydberg atom-based microwave RF sensor. An optical Bloch equation has been set up based on the configuration that two-color cascading lasers exciting atom to highly Rydberg state and a microwave RF coupling this Rydberg state to its adjacent neighbor. The numerical simulation shows that the sensitivity of the atomic RF sensor is correlated with the amplitude strengths of the applied two lasers and the RF itself. It also depends on the frequency detuning of the coupling laser, which induces an asymmetrically optical splitting. The coupling laser frequency fixing at the shoulder of the stronger one is more favorable for a higher sensitivity. Accordingly, we perform an experimental demonstration for the optimization of all these parameters and the sensitivity is improved to 12.50(04) nVcm−1·Hz−1/2.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics9040250