High quality electromagnetically induced transparency spectroscopy of <sup>87</sup>Rb in a buffer gas cell with a magnetic field

High quality electromagnetically induced transparency spectroscopy of ⁸⁷Rb in a buffer gas cell with a magnetic field

Cheng Hong^{1, 2}, Wang Han-Mu^{1, 2}, Zhang Shan-Shan^{1, 2}, Xin Pei-Pei^{1, 2}, Luo Jun^{1, 2}, Liu Hong-Ping^{1, 2, †}

(color online) (a) Experimental setup for EIT spectral measurement. PBS: polarizing beam splitter; PM: permanent magnet; PD: photo detector. (b) Magnetic sublevels diagram of ⁸⁷Rb atoms in the presence of the magnetic field. All possible polarization combinations for the Λ-EIT scheme are shown.