Show simple item record

dc.contributor.authorArbiol, Jordi
dc.contributor.authorMagen, Cesar
dc.contributor.authorBecker, Pascal
dc.contributor.authorJacopin, Gwénolé
dc.contributor.authorChernikov, Alexey
dc.contributor.authorSchäfer, Sören
dc.contributor.authorFurtmayr, Florian
dc.contributor.authorTchernycheva, Maria
dc.contributor.authorRigutti, Lorenzo
dc.contributor.authorTeubert, Jörg
dc.contributor.authorChatterjee, Sangam
dc.contributor.authorMorante, Joan R.
dc.contributor.authorEickhoff, Martin
dc.description.abstractWe present a novel approach for self-assembled growth of GaN quantum wires (QWRs) exhibiting strong confinement in two spatial dimensions. The GaN QWRs are formed by selective nucleation on {11 (2) over bar0} (a-plane) facets formed at the six intersections of {1 (1) over bar 00} (m-plane) sidewalls of AlN/GaN nanowires used as a template. Based on microscopy observations we have developed a 3D model explaining the growth mechanism of QWRs. We show that the QWR formation is governed by self-limited pseudomorphic growth on the side facets of the nanowires (NWs). Quantum confinement in the QWRs is confirmed by the observation of narrow photoluminescence lines originating from individual QWRs with emission energies up to 4.4 eV. Time-resolved photoluminescence studies reveal a short decay time (similar to 120 ps) of the QWR emission. Capping of the QWRs with AlN allows enhancement of the photoluminescence, which is blue-shifted due to compressive strain. The emission energies from single QWRs are modelled assuming a triangular cross-section resulting from self-limited growth on a-plane facets. Comparison with the experimental results yields an average QWR diameter of about 2.7 nm in agreement with structural characterization. The presented results open a new route towards controlled realization of one-dimensional semiconductor quantum structures with a high potential both for fundamental studies and for applications in electronics and in UV light generation.en
dc.rightsIn Copyright*
dc.titleSelf-assembled GaN quantum wires on GaN/AlN nanowire templatesen
local.affiliationFB 07 - Mathematik und Informatik, Physik, Geographiede_DE
local.commentDieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich. This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.
local.opus.instituteI. Physikalisches Institutde_DE
local.source.freetextNanoscale, 4, 7517-7524, doi: 10.1039/c2nr32173dde_DE

Files in this item


This item appears in the following Collection(s)

Show simple item record

In Copyright