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Absorption of Light by a Nanowire with Transitions of Carriers from the Valence Band to Donor States in the Presence of an Electric Field
Authors
	Sinyavskii E.P.
	Sokovnich S.M.
Date of publication
	2022
DOI
	10.31114/2078-7707-2022-3-135-139
Abstract
	The absorption of light by a quantum wire with the transition of carriers from the valence band to donor states in the presence of a transverse electric field is studied theoretically. The impurity center is modeled by zero-range potentials. The frequency dependences of the light absorption coefficient are analyzed for various electric field strengths. The study gave the following results: 1. With an increase in the electric field, the value of the light absorption coefficient decreases. The electric field shifts the potential energy extremes from the axis of the quantum wire. In connection with this, the overlap of the wave functions of the bound state and the electron in the conduction band decreases. This is true for the case where the impurity is located on the axis of the quantum wire. If the impurity is not on the axis of symmetry, then it becomes possible to control the position of the maximum of the light absorption coefficient using an electric field. 2. With an increase in the electric field strength, the position of the maximum absorption coefficient of light shifts to the long-wave frequency region. This is due to the fact that with an increase in the electric field, the ceiling of the valence band rises, which means that the energy difference between the impurity state and the ceiling of the valence band decreases. 3. At a fixed value of the electric field strength, as well as in the absence of an electric field, with an increase in the value of the binding energy, the value of the light absorption coefficient decreases. 4. At a fixed value of the electric field strength, with an increase in the binding energy, the maximum of the light absorption coefficient shifts to the long-wavelength region.
Keywords
	quantum wire, external electric field, impurity centers, zero radius potential method, bound state energy, light absorption coefficient.
Library reference
	Sinyavskii E.P., Sokovnich S.M. Absorption of Light by a Nanowire with Transitions of Carriers from the Valence Band to Donor States in the Presence of an Electric Field // Problems of Perspective Micro- and Nanoelectronic Systems Development - 2022. Issue 3. P. 135-139. doi:10.31114/2078-7707-2022-3-135-139
URL of paper
	http://www.mes-conference.ru/data/year2022/pdf/D055.pdf