Magnetooptical properties of quantum wells with D (−) centers |
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Authors: | V. D. Krevchik A. B. Grunin Vas. V. Evstifeev |
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Affiliation: | (1) Penza State University, Penza, 440026, Russia |
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Abstract: | The D (?) states in a quantum well under the magnetic field longitudinal with respect to the axis of growth of the structure are considered. In the context of the model of the zero-radius potential, an equation that defines the dependence of the binding energy of the D (?) state on the parameters of the potential of the structure, the coordinates of the D (?) center, and the strength of the magnetic field is derived. The results are compared with the experimental data on the dependence of the binding energy of the D (?) state on the magnetic field. There is satisfactory agreement between the theoretical calculations and experimental data in the range of magnetic fields B < 10 T. The role of dimensionality in the modification of the coordinate dependence of the binding energy on the 2D → 1D → 0D transition is clarified. The impurity magnetooptical absorption coefficient in a multiple quantum well structure is calculated, and the spectral dependence of the coefficient is studied. It is shown that a substantial contribution to the broadening of the absorption lines is made by the dispersion of quantum well widths in the structure. |
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