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The effect of the electric field on the photoionization cross-section

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The effect of the electric field on the donor impurity is investigated in the case of a spherical conduction band with the use of a variational procedure. An analytical expression for the photoionization cross-section as a function of photon energy within the effective mass approximation of an impurity atom in an applied field was obtained. The effect of central cell correction by means of a semi-empirical short-range potential is taken into account. It has been found that the binding energy and the spectral dependence of the cross-section are very sensitive to the electric field, the shape of the impurity potential and their combined effect.

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Correspondence to A. Sali or M. Fliyou or H. Loumrhari.

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Sali, A., Fliyou, M. & Loumrhari, H. The effect of the electric field on the photoionization cross-section. Nouv Cim D 20, 823–831 (1998). https://doi.org/10.1007/BF03185483

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PACS 71.55

  • Impurity and defect levels.

PACS 78.20

  • Optical properties of bulk materials and thin films.