Electron energy spectrum and oscillator strengths of quantum transitions in double quantum ring nanostructure driven by electric field

• Main Authors: O.M. Makhanets, V.I. Gutsul, A.I. Kuchak
• Format: Article
• Language: English
• Published: Institute for Condensed Matter Physics 2018-12-01
• Series: Condensed Matter Physics
• Subjects: nanoring; electron; energy spectrum; oscillator strength; electric field
• Online Access: https://doi.org/10.5488/CMP.21.43704

The effect of homogeneous electric field on the energy spectrum, wave functions of electron and oscillator strengths of intra-band quantum transitions in a double cylindrical quantum ring (GaAs/Al_{x}Ga_{1-x}As) is studied within the approximations of effective mass and rectangular potentials. The calculations are performed using the method of expansion of quasiparticle wave function over a complete set of cylindrical wave functions obtained as exact solutions of Schrödinger equation for an electron in a nanostructure without electric field. It is shown that the electric field essentially affects the electron localization in the rings of a nanostructure. Herein, the electron energies and oscillator strengths of intra-band quantum transitions non-monotonously depend on the intensity of electric field.