Coherent Optical Processes on Cs D${}_2$ line Magnetically Induced Transitions

Abstract

The increased spectral resolution allowed by the use of extremely thin vapor cells has led to the observation of interesting behaviour of alkali transitions when placed in a magnetic field. Particularly, transitions obeying an apparent $F_e-F_g\equiv \Delta F=\pm 2$ selection rule, referred to as magnetically-induced (MI) transitions, have their probabilities largely increase in the intermediate interaction regime while being null at zero and higher magnetic fields. With an 800 nm-thick Cs vapor cell placed in a field up to 1.5 kG, we show here that the generation of electromagnetically induced transparency (EIT), realized in $\Lambda$-systems involving $\Delta F=-2$ MI transitions, is only possible when both the coupling and probe beams are ${\sigma }^{-}$-circular polarized, demonstrating that EIT is affected by magnetic circular dichroism. A similar rule of thumb can be extrapolated for $\Delta F=+2$ MI transitions and ${\sigma }^{+}$ polarization. Because of the high frequency shift slope (typ. 4 MHz/G), the generation of EIT resonances involving MI transitions is interesting, especially in the context of growing attention towards micro-machined alkali vapor cell sensors.

References in corpus (10)

• Electromagnetically-induced transparency, absorption, and microwave field sensing in a Rb vapor cell with a three-color all-infrared laser system
• Ultra-Narrow Faraday Rotation Filter at the Rb D1 Line
• Cs CPT magnetometer for cardio-signal detection in unshielded environment
• Saturation effects in the sub-Doppler spectroscopy of Cesium vapor confined in an Extremely Thin Cell
• Giant modification of atomic transitions probabilities induced by magnetic field: forbidden transitions become predominant
• Optimized ultra-narrow atomic bandpass filters via magneto-optic rotation in an unconstrained geometry
• Four-level N-scheme crossover resonances in Rb saturation spectroscopy in magnetic fields
• Circular dichroism in atomic vapors: magnetically induced transitions responsible for two distinct behaviors
• Dark resonance formation with magnetically-induced transitions: extension of spectral range and giant circular dichroism
• Simultaneous two-photon resonant optical laser locking (STROLLing) in the hyperfine Paschen--Back regime

Cited by in corpus (4)

• Precision Measurement of the Excited State Landé g-factor and Diamagnetic Shift of the Cesium D${}_2$ Line
• Wide range linear magnetometer based on a sub-microsized K vapor cell
• Formation of strongly shifted EIT resonances using "forbidden" transitions of Cesium
• Saturated absorption technique used in Potassium microcell for magnetic field sensing