High Contrast Electromagnetically Induced Transparency in a Nitrogen Filled Rb Vapour Cell

作者：Hossain M M^*; Mitra S; Ray B; Ghosh P N

来源：Laser Physics, 2009, 19(10): 2008-2013.

DOI：10.1134/S1054660X09190104

We observe the electromagnetically induced transparency (EIT) spectra inside a nitrogen filled Rb vapour cell (Rb-N-2) in a five-level.-type system of D-2 transition of Rb atom. The high contrast EIT resonance in buffer gas filled Rb cell is obtained under our experimental conditions. The effect of velocity changing coherence preserving collisions to obtain the contrast resonance in buffer gas cell has been discussed. We measured the dependence of EIT width and height on pump intensity and find that the EIT width (FWHM) and peak height have a linear dependence on pump intensity. Our experimental results show that the presence of N-2 buffer gas reduces the power broadening of the observed resonances.

• 出版日期2009-10