Determination of the Minimum Island Size for Full Exciton Localization Due to Thickness Fluctuations in Zn1-xCdxSe Quantum Wells

Abstract

Atomic layer fluctuations of the thickness of quantum wells (QWs) are one of the causes of exciton localization. Here we present the results of the determination of the minimum lateral dimensions of islands formed by thickness fluctuations in Zn(1)(-x)Cd(x)Se QWs which produce full exciton localization. We have calculated the localization energy of excitons in the frame of the factorized-envelope approximation. We found that the excitons are well localized in the islands of the QW when their dimensions are larger than ^15 times the exciton Bohr radius. This result allows us to evaluate the quality of the QW structure and interpret the photoluminescence characteristics of QWs.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2001
Accession Number
ADP013294

Entities

People

  • I. Hernandez-calderon
  • P. Diaz-arencibia

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Emission
  • Emission Spectra
  • Energy
  • Equations
  • Ground State
  • Hard Copy
  • High Energy
  • Low Temperature
  • Materials
  • Molecular Beam Epitaxy
  • Molecular Beams
  • Nanostructures
  • Quantum Wells
  • Spectra
  • Step Functions
  • Technical Information Centers
  • Thickness

Fields of Study

  • Materials science

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  • Fluid Dynamics.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene
  • Quantum Computing