Correlated Structural, Electronic, and Optical Properties of AlN/GaN Multiple Quantum Disks in GaN nanowires

A. M. Fischer (1) , K.W. Sun (1) , F. Ponce (1) , Rudeesun Songmuang (2) , E. Monroy (3)

1 ASU - Department of Physics, Arizona State University
2 NEEL - NPSC - Nanophysique et Semiconducteurs
3 NPSC - Nanophysique et Semiconducteurs

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.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

A. M. Fischer, K.W. Sun, F. Ponce, Rudeesun Songmuang, E. Monroy. Correlated Structural, Electronic, and Optical Properties of AlN/GaN Multiple Quantum Disks in GaN nanowires. Japanese Journal of Applied Physics, part 2 : Letters, 2012, 5 (2), pp.025001. ⟨10.1143/APEX.5.025001⟩. ⟨hal-01003146⟩