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The energy eigenstates of two quantum dots systems placed at the air-semiconductor interface

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

Affiliation

  1. Department of Solid State and Theoretical Physics, Al. I. Cuza University, Iasi, Romania

Abstract

In this study, the nanostructured systems formed by two cylindrical quantum dots (QDs) it are considered - one is embedded into semiconductor substrate (GaAs) 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: Feb. 17, 2009
Accepted at: May 28, 2009

Citation

I. DUMITRU, I. ASTEFANOAEI, A. STANCU, The energy eigenstates of two quantum dots systems placed at the air-semiconductor interface, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 5, pp. 542-546 (2009)