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Nonlinear optical response in a zincblende GaN cylindrical quantum dot with donor impurity center
dc.creator | Hoyos J.H. | spa |
dc.creator | Correa J.D. | spa |
dc.creator | Mora-Ramos M.E. | spa |
dc.creator | Duque C.A. | spa |
dc.date.accessioned | 2016-06-23T14:01:37Z | |
dc.date.available | 2016-06-23T14:01:37Z | |
dc.date.created | 2016 | |
dc.identifier.issn | 9214526 | |
dc.identifier.uri | http://hdl.handle.net/11407/2281 | |
dc.description.abstract | 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. | eng |
dc.language.iso | eng | |
dc.publisher | Elsevier | spa |
dc.relation.isversionof | http://www.sciencedirect.com/science/article/pii/S0921452615303707 | spa |
dc.source | Scopus | spa |
dc.title | Nonlinear optical response in a zincblende GaN cylindrical quantum dot with donor impurity center | spa |
dc.type | Article in Press | eng |
dc.rights.accessrights | info:eu-repo/semantics/restrictedAccess | |
dc.rights.accessrights | info:eu-repo/semantics/restrictedAccess | |
dc.contributor.affiliation | Departamento de Ciencias Básicas, Universidad de Medellín, Cra. 87 No. 30-65, Medellín, Colombia | spa |
dc.contributor.affiliation | Centro de Investigación en Ciencias, Instituto de Investigación en Ciencias Básicas y Aplicadas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, CP 62209 Cuernavaca, Morelos, Mexico | spa |
dc.contributor.affiliation | 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 | spa |
dc.identifier.doi | 10.1016/j.physb.2015.12.038 | |
dc.subject.keyword | Electric fields | eng |
dc.subject.keyword | Electromagnetic wave absorption | eng |
dc.subject.keyword | Gallium nitride | eng |
dc.subject.keyword | Hydraulics | eng |
dc.subject.keyword | Hydrostatic pressure | eng |
dc.subject.keyword | Light absorption | eng |
dc.subject.keyword | Nanocrystals | eng |
dc.subject.keyword | Point defects | eng |
dc.subject.keyword | Potential energy | eng |
dc.subject.keyword | Quantum optics | eng |
dc.subject.keyword | Quantum theory | eng |
dc.subject.keyword | Semiconductor quantum dots | eng |
dc.subject.keyword | Semiconductor quantum wells | eng |
dc.subject.keyword | Zinc sulfide | eng |
dc.subject.keyword | Cylindrical quantum dot | eng |
dc.subject.keyword | Dielectric susceptibility | eng |
dc.subject.keyword | Donor impurity state | eng |
dc.subject.keyword | Effective mass approximation | eng |
dc.subject.keyword | Nonlinear optical absorption | eng |
dc.subject.keyword | Nonlinear optical absorption coefficients | eng |
dc.subject.keyword | Nonlinear optical response | eng |
dc.subject.keyword | Rotating wave approximations | eng |
dc.subject.keyword | Nonlinear optics | eng |
dc.relation.ispartofen | Physica B: Condensed Matter Volume 484, 1 March 2016, Pages 73–82 | eng |
dc.type.driver | info:eu-repo/semantics/article |
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