Nonlinear optical response in a zincblende GaN cylindrical quantum dot with donor impurity center

Jaime H. Hoyos, J. D. Correa, M. E. Mora-Ramos, C. A. Duque

Resultado de la investigación: Contribución a una revistaArtículoInvestigaciónrevisión exhaustiva

6 Citas (Scopus)

Resumen

© 2015 Elsevier B.V. All rights reserved. We calculate the nonlinear optical absorption coefficient of a cylindrical zincblende GaN-based quantum dot. For this purpose, we consider Coulomb interactions between electrons and an impurity ionized donor atom. The electron-donor-impurity spectrum and the associated quantum states are calculated using the effective mass approximation with a parabolic potential energy model describing both the radial and axial electron confinement. We also include the effects of the hydrostatic pressure and external electrostatic fields. The energy spectrum is obtained through an expansion of the eigenstates as a linear combination of Gaussian-type functions which reduces the computational effort since all the matrix elements are obtained analytically. Therefore, the numerical problem is reduced to the direct diagonalization of the Hamiltonian. The obtained energies are used in the evaluation of the dielectric susceptibility and the nonlinear optical absorption coefficient within a modified two-level approach in a rotating wave approximation. This quantity is investigated as a function of the quantum dot dimensions, the impurity position, the external electric field intensity and the hydrostatic pressure. The results of this research could be important in the design and fabrication of zincblende GaN-quantum-dot-based electro-optical devices.
Idioma originalInglés estadounidense
Páginas (desde-hasta)73-82
Número de páginas10
PublicaciónPhysica B: Condensed Matter
Volumen484
DOI
EstadoPublicada - 1 mar 2016

Huella dactilar

zincblende
Semiconductor quantum dots
quantum dots
Hydrostatic pressure
Impurities
hydrostatic pressure
impurities
Light absorption
Electrons
absorptivity
optical absorption
Electrooptical devices
Electric fields
Hamiltonians
electrons
electric fields
Coulomb interactions
Potential energy
approximation
eigenvectors

Citar esto

@article{66132fcc52a844aa96c4d72de2fa3f2d,
title = "Nonlinear optical response in a zincblende GaN cylindrical quantum dot with donor impurity center",
abstract = "{\circledC} 2015 Elsevier B.V. All rights reserved. We calculate the nonlinear optical absorption coefficient of a cylindrical zincblende GaN-based quantum dot. For this purpose, we consider Coulomb interactions between electrons and an impurity ionized donor atom. The electron-donor-impurity spectrum and the associated quantum states are calculated using the effective mass approximation with a parabolic potential energy model describing both the radial and axial electron confinement. We also include the effects of the hydrostatic pressure and external electrostatic fields. The energy spectrum is obtained through an expansion of the eigenstates as a linear combination of Gaussian-type functions which reduces the computational effort since all the matrix elements are obtained analytically. Therefore, the numerical problem is reduced to the direct diagonalization of the Hamiltonian. The obtained energies are used in the evaluation of the dielectric susceptibility and the nonlinear optical absorption coefficient within a modified two-level approach in a rotating wave approximation. This quantity is investigated as a function of the quantum dot dimensions, the impurity position, the external electric field intensity and the hydrostatic pressure. The results of this research could be important in the design and fabrication of zincblende GaN-quantum-dot-based electro-optical devices.",
author = "Hoyos, {Jaime H.} and Correa, {J. D.} and Mora-Ramos, {M. E.} and Duque, {C. A.}",
year = "2016",
month = "3",
day = "1",
doi = "10.1016/j.physb.2015.12.038",
language = "American English",
volume = "484",
pages = "73--82",
journal = "Physica B: Condensed Matter",
issn = "0921-4526",
publisher = "Elsevier",

}

Nonlinear optical response in a zincblende GaN cylindrical quantum dot with donor impurity center. / Hoyos, Jaime H.; Correa, J. D.; Mora-Ramos, M. E.; Duque, C. A.

En: Physica B: Condensed Matter, Vol. 484, 01.03.2016, p. 73-82.

Resultado de la investigación: Contribución a una revistaArtículoInvestigaciónrevisión exhaustiva

TY - JOUR

T1 - Nonlinear optical response in a zincblende GaN cylindrical quantum dot with donor impurity center

AU - Hoyos, Jaime H.

AU - Correa, J. D.

AU - Mora-Ramos, M. E.

AU - Duque, C. A.

PY - 2016/3/1

Y1 - 2016/3/1

N2 - © 2015 Elsevier B.V. All rights reserved. We calculate the nonlinear optical absorption coefficient of a cylindrical zincblende GaN-based quantum dot. For this purpose, we consider Coulomb interactions between electrons and an impurity ionized donor atom. The electron-donor-impurity spectrum and the associated quantum states are calculated using the effective mass approximation with a parabolic potential energy model describing both the radial and axial electron confinement. We also include the effects of the hydrostatic pressure and external electrostatic fields. The energy spectrum is obtained through an expansion of the eigenstates as a linear combination of Gaussian-type functions which reduces the computational effort since all the matrix elements are obtained analytically. Therefore, the numerical problem is reduced to the direct diagonalization of the Hamiltonian. The obtained energies are used in the evaluation of the dielectric susceptibility and the nonlinear optical absorption coefficient within a modified two-level approach in a rotating wave approximation. This quantity is investigated as a function of the quantum dot dimensions, the impurity position, the external electric field intensity and the hydrostatic pressure. The results of this research could be important in the design and fabrication of zincblende GaN-quantum-dot-based electro-optical devices.

AB - © 2015 Elsevier B.V. All rights reserved. We calculate the nonlinear optical absorption coefficient of a cylindrical zincblende GaN-based quantum dot. For this purpose, we consider Coulomb interactions between electrons and an impurity ionized donor atom. The electron-donor-impurity spectrum and the associated quantum states are calculated using the effective mass approximation with a parabolic potential energy model describing both the radial and axial electron confinement. We also include the effects of the hydrostatic pressure and external electrostatic fields. The energy spectrum is obtained through an expansion of the eigenstates as a linear combination of Gaussian-type functions which reduces the computational effort since all the matrix elements are obtained analytically. Therefore, the numerical problem is reduced to the direct diagonalization of the Hamiltonian. The obtained energies are used in the evaluation of the dielectric susceptibility and the nonlinear optical absorption coefficient within a modified two-level approach in a rotating wave approximation. This quantity is investigated as a function of the quantum dot dimensions, the impurity position, the external electric field intensity and the hydrostatic pressure. The results of this research could be important in the design and fabrication of zincblende GaN-quantum-dot-based electro-optical devices.

U2 - 10.1016/j.physb.2015.12.038

DO - 10.1016/j.physb.2015.12.038

M3 - Article

VL - 484

SP - 73

EP - 82

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

SN - 0921-4526

ER -