Tunable Microwave Magnetic Field Detection based on Rabi Resonance with a Single Cesium-Rubidium Hybrid Vapor Cell

TL;DR

This paper demonstrates a tunable microwave magnetic field detector using a hybrid vapor cell with cesium and rubidium atoms, enabling broad frequency coverage and simultaneous multi-species detection for improved atomic sensing applications.

Contribution

It introduces a novel hybrid vapor cell with cesium and rubidium atoms for tunable microwave magnetic field detection, expanding the detectable frequency range and enabling simultaneous multi-species Rabi resonance observation.

Findings

Achieved microwave magnetic field detection over 4.8 GHz bandwidth around 8.1 GHz.

Successfully observed Rabi resonance signals from 85Rb, 87Rb, and 133Cs in a single vapor cell.

Enabled comparison of electromagnetic environments using multiple atomic species in one device.

Abstract

We experimentally investigated Rabi resonance-based continuously frequency-tunable microwave (MW) magnetic field detection using a single hybrid vapor cell filled with cesium and rubidium atoms. The multispecies atomic systems, with their tunable abilities in transition frequencies, enabled this atomic sensing head to cover a broader detectable MW field scope compared to the use of a single metal atom. Here, we demonstrated the simultaneous observation of atomic Rabi resonance signals with 85Rb, 87Rb, and 133Cs in the same vapor cell. Using an experimentally feasible static magnetic field (DC field) below 500 Gauss, we realized a MW magnetic field strength detection with bandwidths of 4.8 GHz around 8.1 GHz. The use of these three atomic systems confined in a single vapor cell also enabled the establishment of an identical MW field with the help of DC field, allowing us to perform a perfect comparison for different applications that require the same electromagnetic environment. The results may be useful for the realization and application of many atomic detectors based on different physical principles.