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Linear and nonlinear optical properties of donors inside a CdSe/ZnTe core/shell nanodot: Role of size modulation
Univ Moulay Ismail, Fac Sci, Phys Dept, LP2MS,Unite Associee,CNRST,URAC 08, BP 11201, Meknes, Morocco.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy. Univ Moulay Ismail, Fac Sci, Phys Dept, LP2MS,Unite Associee,CNRST,URAC 08, BP 11201, Meknes, Morocco.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy. Univ Moulay Ismail, Fac Sci, Phys Dept, LP2MS,Unite Associee,CNRST,URAC 08, BP 11201, Meknes, Morocco;Max Planck Inst Phys Complexer Syst, Nothnitzer Str 38, D-01187 Dresden, Germany;U.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Physics. Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics. Uppsala Univ, Dept Phys & Astron, Condensed MatterTheory Grp, S-75120 Uppsala, Sweden.ORCID iD: 0000-0003-1231-9994
2019 (English)In: RESULTS IN PHYSICS, ISSN 2211-3797, Vol. 14, article id 102414Article in journal (Refereed) Published
Abstract [en]

The optical absorption coefficient (OAC) and the refractive index (RI), related to a confined donor, were theoretically investigated by the mean of the density matrix formalism. In order to obtain the 1s - 1p donor transition energy a variational calculation, within the context of the effective-mass approach, was deployed. Our numerical results exhibit the possibility to modulate the electronic and optical properties of confined donors by tailoring the inner and outer radii of the core/shell heterodot. Further, we have obtained that the nanodot size shrinking leads, for very small values of core radius, to reduce the magnitude of the total absorption coefficient resonance peak. It was also obtained that the resonance peak position of the absorption coefficient is redshifted with increasing the core radius for a fixed shell thickness. The same situation occurs when reducing the thickness of the shell material for a fixed core size.

Place, publisher, year, edition, pages
ELSEVIER , 2019. Vol. 14, article id 102414
Keywords [en]
Shallow donor, Core/shell materials, Optical absorption coefficient, Refractive index, Size effect, Quantum dots
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-394702DOI: 10.1016/j.rinp.2019.102414ISI: 000485104100067OAI: oai:DiVA.org:uu-394702DiVA, id: diva2:1360191
Funder
Swedish Research Council, 348-2011-7264Available from: 2019-10-11 Created: 2019-10-11 Last updated: 2019-10-11Bibliographically approved

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