Understanding Polarization Properties of InAs Quantum Dots by Atomistic Modeling of Growth Dynamics

Abstract

A model for realistic InAs quantum dot composition profile is proposed and analyzed, consisting of a double region scheme with an In-rich internal core and an In-poor external shell, in order to mimic the atomic scale phenomena such as In-Ga intermixing and In segregation during the growth and overgrowth with GaAs. The parameters of the proposed model are derived by reproducing the experimentally measured polarization data. Further understanding is developed by analyzing the strain fields which suggests that the two-composition model indeed results in lower strain energies than the commonly applied uniform composition model.


Tutti gli autori

  • Tasco V.; Usman M.; Todaro M.T.; De Giorgi M.; Passaseo A.

Titolo volume/Rivista

AIP conference proceedings


Anno di pubblicazione

2013

ISSN

0094-243X

ISBN

Non Disponibile


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Nessuna citazione

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Settori ERC

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Codici ASJC

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