Resonance of Electromagnetically Induced Transparency in the Selective Reflection Signal of Atomic Cs Vapor

The process of electromagnetically induced transparency (EIT) was investigated using two different probe radiations in Cs atomic vapor: in the first case probe radiation– transmission through a nanocell (NC) with the formation of EIT_T; in the second–selective reflection (SR) of laser radiation from the boundary of the atom-dielectric vapor (dielectric is nanocell window) with the formation of EIT_SR. To form EIT resonances, we used two continuous narrow-band lasers with λ = 852 nm and a nanocell with an atomic vapor column thickness in the range of 150–1500 nm. A comparison of the formation of EIT resonance in the first and second cases was carried out. Probe radiation containing EIT_T and EIT_SR-resonances propagates in opposite directions. It is noted that in a few cases, the formation of EIT resonance is more effective using SR radiation. The splitting of the EIT_SR-resonance in the longitudinal magnetic field into seven equidistant components was recorded, which allows remote monitoring of the magnetic field.