Optical coefficients in a semiconductor quantum ring: Electric field and donor impurity effects

Effect of Ring Radius and Electric Field on the Relative Refractive Index of a GaAs Quantum Ring

“…The influence of lateral electric field on the variations of intraband optical absorption changes for a concentric double QR is handled by Baghramyan et al [16] and to the possibility of controlling the optoelectronic properties with the applied electric field and as well as light polarization are reported [16]. The effect of electric field on the optical responses in the presence of donor impurity is presented by Restrepo and co-workers [17] and also by Duque and coworkers [18]. The impact of donor impurity together with the hydrostatic pressure on the nonlinear optical properties of GaAs QR is analyzed in the other study of Retrepo and his group [19].…”

Magnetic field effect on the linear and nonlinear refractive index and optical absorption of a donor in a GaAs quantum ring

“…The optical properties related to the transitions of the charge carriers in nanostructures have great potential for instrument applications in photodetectors, laser amplifiers and optical communications [9]. Consequently, in recent years, the optical properties of low dimensional systems such as the linear, nonlinear and total refractive indexes (RIs), optical absorption coefficients (OACs) [4,7,[16][17][18][19][20][21][22][23][24][25] and oscillator strength [26][27][28][29] have attracted great attention in the theoretical studies. In a recent work [16], it has been exposed that the peak location of the optical absorption coefficients blueshifts and their amplitude decreases under the presence of a magnetic field for the impurity confined in a core/shell QD.…”

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

“…Cylindrical semiconductor quantum rings are intensively investigated theoretically [8][9][10][11][12][13][14]. Changing the geometric sizes of the rings one can affect the energy spectra of quasiparticles and obtain the necessary optical properties.…”

“…In the papers [10][11][12], the authors investigated the effect of a homogeneous electric field on the optical properties of quantum nanorings using the model of a parabolic potential. The wave function of an electron in an electric field was written as an expansion over a complete set of its wave functions in an infinitely deep potential well with a further solution of the corresponding secular equation.…”

“…In the proposed paper, we are going to study the structure similar to that of [10][11][12]. However, an optimal model of confined potential is to be used with an orthonormal basis of cylindrical wave functions obtained in the model of finite potential.…”