Role of degenerate Zeeman levels in electromagnetically induced transparency

Chen, YC, Lin CW, Yu IA.  2000.  Role of degenerate Zeeman levels in electromagnetically induced transparency, May. Physical Review A. 61:6., Number 5


We have observed various Lambda-type electromagnetically induced transparency (EIT) spectra in laser-cooled Rb-87 atoms of different laser polarization configurations. Unexpected profiles occur in the EIT spectra. We have found the degenerate Zeeman sublevels are responsible for these profiles. The experimental data are in good agreement with the results from the theoretical calculation which takes into account all the 13 Zeeman levels in the Lambda system. Our study demonstrates that Zeeman sublevels play important roles in quantum interference phenomena such as EIT and amplification without population inversion (AWI), and should be taken into account in the analysis of these phenomena.


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