Peculiarities of Electromagnetically-Induced Transparency (EIT) in Extremely Thin Cell of alkali metal atomic vapour.

Electromanetically Induced Resonances in Sub-Micron Thin Rb-Vapor Layer

Narrow and contrast resonance of increased absorption in Λ-system observed in Rb cell with buffer gas

International audience; We report observation of a narrow (sub-natural) and high-contrast resonance of increased absorption (“bright” resonance) in Rb cell with Ne buffer gas under previously unexplored experimental conditions for coupling and probe radiation configuration. The coupling laser-stabilized frequency is detuned by ~3 GHz from 5S1/2, Fg=3 → 5P3/2, Fe=2,3,4 transitions, while the probe laser frequency is scanned across these transitions. We believe the bright resonance formation, occurring when the probe laser frequency is blue-shifted from the coupling frequency by a value of the ground state hyperfine splitting, is caused predominantly by a 2-photon absorption of the probe radi…

high-spatial-resolution monitoring of strong magnetic field using Rb nano-thin-cell

Absorption, fluorescence and EIT processes in the extremely thin cell filled with Rb and buffer gas neon

International audience; Comparison of the absorption and fluorescence in the nanocell (or so called extremely thin cell) filled with pure Rb with another one filled with Rb and Neon gas is provided. The effect of the collapse and revival of Dicke-type narrowing is still observable for thickness L=lambda/2, and lambda, where lambda , is a resonant laser wavelength either 780 nm, or 795 nm (for Rb, D2 or D1 line). For L=  so called velocity selective optical pumping (VSOP) resonance located at the atomic transition is still observable, while the linewidth is increased by 4 times in comparison with that obtained in the pure Rb nanocell. Comparison with the theory is presented. Electromagnetic…