Impurity-Related Nonlinear Optical Absorption in Delta-Doped Quantum Rings

• Authors: R. Restrepo , J. Martínez-Orozco , M. Barseghyan , M. Mora-Ramos , C. Duque
• Languages of publication: EN

Abstracts

EN

Using a variational procedure within the effective mass approximation, we have calculated the hydrogenic impurity binding energy as well as the impurity-related nonlinear optical absorption in a single quantum ring with axial n-type delta-doping. The delta-like potential along the z-direction is analytically modeled with a Hartree-like confining profile fitted to a one-dimensional Thomas-Fermi-based potential in the local density approximation. Both on-center and on-edge impurity positions are considered and the energies of the impurity states are examined as functions of the vertical size of the ring. It is found that the effect of changes in the geometry of the quantum ring leads to a shifting of the resonant peaks of the intra-band optical spectrum.

Keywords

EN

42.65.-k; 73.21.-b; 78.67.-n

Discipline

• 73.21.-b: Electron states and collective excitations in multilayers, quantum wells, mesoscopic, and nanoscale systems(for electron states in nanoscale materials, see 73.22.-f)
• 78.67.-n: Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures(for magnetic properties of nanostructures, see 75.75.-c; for electronic transport in nanoscale structures, see 73.63.-b; for mechanical properties of nanoscale systems, see 62.25.-g)
• 42.65.-k: Nonlinear optics

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 125
• Issue: 2
• Pages: 245-247

Dates

published

2014-02

Contributors

author

R. Restrepo

• Física Teórica y Aplicada, Escuela de Ingeniería de Antioquia, AA 7516, Medellín, Colombia

author

J. Martínez-Orozco

• Unidad Académica de Física, Universidad Autónoma de Zacatecas, CP 98060, México

author

M. Barseghyan

• Department of Solid State Physics, Yerevan State University, 0025 Yerevan, Armenia

author

M. Mora-Ramos

• Física Teórica y Aplicada, Escuela de Ingeniería de Antioquia, AA 7516, Medellín, Colombia
• Facultad de Ciencias, Universidad Autónoma del Estado de Morelos, CP 62209, México
• Grupo de Materia Condensada-UdeA, Instituto de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia

author

C. Duque

• Grupo de Materia Condensada-UdeA, Instituto de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia

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Identifiers

DOI

10.12693/APhysPolA.125.245