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- Chafai, A.Univ Moulay Ismail, Dept Phys, Fac Sci, Unite Associee CNRST URAC 08,LP2MS, BP 11201, Meknes, Morocco (author)
Nonlinear optical characteristics of an exciton in a GaSb-capped InSb heterodot : role of size control
- Article/chapterEnglish2020
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- 2020-02-03
- SPRINGER HEIDELBERG,2020
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- LIBRIS-ID:oai:DiVA.org:uu-409662
- https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-409662URI
- https://doi.org/10.1140/epjp/s13360-019-00003-4DOI
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- Language:English
- Summary in:English
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- The optical characteristics of a bound electron-hole quasiparticle inside a GaSb-capped InSb nanodot were investigated using a combination between a density-matrix approach and variational calculations. Our theoretical model considers the electric permittivity mismatch between the core and shell materials via the self-energy term obtained by the means of an image charge approach. Furthermore, the core-to-shell conduction and valence band offsets were modeled by finite-depth confinement potentials. To elucidate the impact of the nanoheterodot spatial parameters on the confined exciton optical properties, we have investigated the change of the refractive index, the optical absorption coefficient, and the 1p-1s exciton transition energy with respect to the nanodot shape. Our numerical results exhibit the great potential for the improvement of the exciton optical properties by tailoring the nanodot size. It was also obtained that, for a fixed core radius, the resonance peak position of the optical absorption coefficient was still constant after a certain shell thickness value. Otherwise, decreasing the shell thickness leads to blue-shifting the 1p-1s transition energy.
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- Essaoudi, I.Uppsala universitet,Materialteori,Univ Moulay Ismail, Dept Phys, Fac Sci, Unite Associee CNRST URAC 08,LP2MS, BP 11201, Meknes, Morocco,Condensed Matter Theory Group (author)
- Ainane, A.Uppsala universitet,Materialteori,Univ Moulay Ismail, Dept Phys, Fac Sci, Unite Associee CNRST URAC 08,LP2MS, BP 11201, Meknes, Morocco;Max Planck Inst Phys Complexer Syst, Nothnitzer Str 38, D-01187 Dresden, Germany,Condensed Matter Theory Group (author)
- Ahuja, Rajeev,1965-Uppsala universitet,Materialteori,Condensed Matter Theory Group(Swepub:uu)rajeeva (author)
- Univ Moulay Ismail, Dept Phys, Fac Sci, Unite Associee CNRST URAC 08,LP2MS, BP 11201, Meknes, MoroccoMaterialteori (creator_code:org_t)
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- In:The European Physical Journal Plus: SPRINGER HEIDELBERG135:22190-5444
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