Abstract

PORTACIO, A.A.; JIMENEZ, A.F.  and  URANGO, M. del P.. Estudio teórico sobre el cambio de índice de refracción y la absorción óptica en un punto cuántico en presencia de un campo magnético uniforme. Rev. mex. fis. [online]. 2016, vol.62, n.4, pp.330-335. ISSN 0035-001X.

We study theoretically linear and nonlinear change of refractive index as well the linear and nonlinear optical absorption in a cylindrical quantum dot (CQD) in the presence of a uniform magnetic field by using the formalism of matrix density and perturbation method. The energy levels and wave functions of an electron in the CQD were obtained by solving the Schrödinger equation independent of time within the effective mass approximation. Numerical calculations are performed for a CQD GaAs/GaAlAs. It was found that the position of the resonance peaks, shifts to regions of lower energies (red shift) when the magnetic field intensity decreases and the dimensions of the nanostructure increases.

Keywords : Optical absorption; cylindrical quantum dot; magnetic field; density matrix.