Application of Magnetically Induced Atomic Transitions F_g = 2 → F_e = 1 of Rubidium D₂-Line in Magnetic Fields

Magnetically induced (MI) transitions of ⁸⁵Rb atoms, D₂-lines 5S_1/2 → 5P_3/2, F_g = 3 → F_e = 1 with circular polarization σ^–, the intensities of which are zero in a zero magnetic field, have been studied experimentally and theoretically. However, their intensities increase significantly in magnetic fields of 0.5–1 kG. The MI transition F_g = 3 → F_e = 1 was used for the first time at the probe radiation frequency to implement the process of electromagnetically induced transparency (EIT). The frequency of the coupling radiation was resonant with the F_g = 2 → F_e = 1 transition. The generated EIT resonance was located on the low-frequency tail of the spectrum. It was shown that EIT resonance was formed only when the probe and coupling radiations had the same circular polarization σ^–. This was true for MI transitions F_e – F_g = ΔF = –2.