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Portrait of Reine Wallenberg. Photo: Kennet Ruona

Reine Wallenberg

Professor, Coordinator Materials Science

Portrait of Reine Wallenberg. Photo: Kennet Ruona

Self-Seeded Axio-Radial InAs-InAs1-xPx Nanowire Heterostructures beyond "common" VLS Growth

Author

  • Bernhard Mandl
  • Mario Keplinger
  • Maria E. Messing
  • Dominik Kriegner
  • Reine Wallenberg
  • Lars Samuelson
  • Günther Bauer
  • Julian Stangl
  • Václav Holý
  • Knut Deppert

Summary, in English

Semiconductors are essential for modern electronic and optoelectronic devices. To further advance the functionality of such devices, the ability to fabricate increasingly complex semiconductor nanostructures is of utmost importance. Nanowires offer excellent opportunities for new device concepts; heterostructures have been grown in either the radial or axial direction of the core nanowire but never along both directions at the same time. This is a consequence of the common use of a foreign metal seed particle with fixed size for nanowire heterostructure growth. In this work, we present for the first time a growth method to control heterostructure growth in both the axial and the radial directions simultaneously while maintaining an untapered self-seeded growth. This is demonstrated for the InAs/InAs1-xPx material system. We show how the dimensions and composition of such axio-radial nanowire heterostructures can be designed including the formation of a "pseudo-superlattice" consisting of five separate InAs1-xPx segments with varying length. The growth of axio-radial nanowire heterostructures offers an exciting platform for novel nanowire structures applicable for fundamental studies as well as nanowire devices. The growth concept for axio-radial nanowire heterostructures is expected to be fully compatible with Si substrates.

Department/s

  • Solid State Physics
  • Centre for Analysis and Synthesis
  • NanoLund

Publishing year

2018-01-10

Language

English

Pages

144-151

Publication/Series

Nano Letters

Volume

18

Issue

1

Document type

Journal article

Publisher

The American Chemical Society (ACS)

Topic

  • Nano Technology

Keywords

  • axio-radial heterostructure
  • epitaxy
  • nanowire growth mechanism
  • Nanowires

Status

Published

ISBN/ISSN/Other

  • ISSN: 1530-6984