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The energy states of cylindrical quantum dot systems

I. DUMITRU1, I. ASTEFANOAEI1, R. GRIMBERG2,* , A. STANCU1

Affiliation

  1. “Alexandru Ioan Cuza” University, Faculty of Physics, Department of Solid State and Theoretical Physics, 700506, Iasi, Romania
  2. NDT Department, National Institute of R&D for Technical Physics, Iasi, Romania

Abstract

The simulation of electron and hole quasiparticles in semiconductor nanostructure is still an important issue for future electronic and optical devices. In this study, a nanostructured systems formed by two cylindrical quantum dots (QDs) it is considered, one is situated at the interface semiconductor substrate (GaAs) – air and the second is situated in air. Our particular interest was on evolution of the eigenstates of confined electrons with the distance between QDs. It was used a one-band model expression for Schrödinger equation [1] to characterize the energy of QDs electrons and that was solved using a finite element method for geometry discretization. The presence of the oscillating envelope function of the electrons for different distances between dots was observed. The wavelength corresponding to the system formed by two QDs is ranged in infrared domain..

Keywords

Cylindrical quantum dots, Finite element method, Infrared domain.

Submitted at: Sept. 25, 2007
Accepted at: Feb. 18, 2008

Citation

I. DUMITRU, I. ASTEFANOAEI, R. GRIMBERG, A. STANCU, The energy states of cylindrical quantum dot systems, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 2, pp. 327-330 (2008)