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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:17 |
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Conference: Bucharest University Faculty of Physics 2017 Meeting
Section: Optics, Spectroscopy, Plasma and Lasers
Title:
Effects of electric, magnetic and intense laser fields on the electromagnetically induced transparency in a semi-parabolic quantum well
Authors:
Doina BEJAN(1), Cristina TRUSCA(2)
*
Affiliation:
1) Faculty of Physics, University of Bucharest, Bucharest, Romania
2) Physics Department, “Politehnica” University of Bucharest, Romania
E-mail
doinitabejan@yahoo.com
Keywords:
semiconductor, semi-parabolic quantum well, non-resonant intense laser, static electric field, magnetic field, electromagnetically induced transparency.
Abstract:
In this work we investigated the effects of the electric, magnetic, non-resonant intense laser fields and control laser on the optical properties (absorption coefficient and refraction index) of a GaAs/Al0.3Ga0.7As semi-parabolic quantum well related to the occurrence of the electromagnetically induced transparency phenomenon. The eigenfunctions and the energy eigenvalues were calculated numerically through a discrete variable technique within the effective mass approximation. The dependence of the transition energies and the dipole moments on the applied external fields was analyzed. Our main findings are: i) the electromagnetically induced transparency occurs in the system in most of the cases but it is advantaged by a proper choice of the external fields; ii) the width of the transparency window for absorption of the probe laser remains constant but is blue-shifted by the augment of the electric or magnetic field strength; iii) the increase of the non-resonant laser intensity strongly enlarges the transparency windows width; iv) the transparency window is highly influenced by the Rabi frequency of the control laser.
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