Effects of electric, magnetic and intense laser fields on the electromagnetically induced transparency in a semi-parabolic quantum well

摘要

The effects of the electric, magnetic, non-resonant intense laser and control laser fields on the electronic and optical properties (absorption coefficient and refraction index) of a GaAs/Al_(0.3)Ga_(0.7)As semi-parabolic quantum well related to the occurrence of the electromagnetically induced transparency phenomenon are investigated. We found that the electromagnetically induced transparency occurs in the system in all cases but it is advantaged by a proper choice of the external fields. The increase of the non-resonant laser intensity strongly enlarges the transparency window width. Furthermore, the transparency window for absorption of the probe laser is blue-shifted by the augment of the electric or magnetic field strength.