Correlated structural, electronic, and optical properties of AlN/GaN multiple quantum disks in GaN nanowires

Alec M. Fischer, Kewei W. Sun, Fernando Ponce, Rudeesun Songmuang, Eva Monroy

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Abstract

The electronic properties of GaN nanowires containing AlN/GaN multiple quantum disks, grown on Si(111) and luminescing at 3.55 eV, have been studied with nanometric resolution and have been correlated with their structural and optical characteristics. Profiles of the electrostatic potential across the quantum disks have been obtained by electron holography. Such profiles suggest an AlN/GaN conduction band offset of ∼1:5 eV and an average internal polarization field in the quantum disks of ∼1:8 MV/cm. A simulated energy band profile based on these results agrees with the luminescence measurements.

Original languageEnglish (US)
Article number025001
JournalApplied Physics Express
Volume5
Issue number2
DOIs
Publication statusPublished - Feb 2012

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ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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