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Title: Probing inhomogeneous composition in core/shell nanowires by Raman spectroscopy

Due to its non-destructive and its micro-spatial resolution, Raman spectroscopy is a powerful tool for a rapid structural and compositional characterization of nanoscale materials. Here, by combining the compositional dependence of the Raman peaks with the existence of photonic modes in the nanowires, we address the composition inhomogeneities of Al{sub x}Ga{sub 1−x}As/GaAs core/shell structures. The experimental results are validated with complementary chemical composition maps of the nanowire cross-sections and finite-difference time-domain simulations of the photonic modes.
Authors:
; ; ; ; ; ; ;  [1] ;  [2] ;  [2] ;  [3]
  1. Laboratoire des Matériaux Semiconducteurs, École Polytechnique Fédérale de Lausanne, 1015 Lausanne (Switzerland)
  2. Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193 Bellaterra, CAT (Spain)
  3. (ICREA), 08019 Barcelona, CAT (Spain)
Publication Date:
OSTI Identifier:
22402633
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 18; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION SPECTROSCOPY; GALLIUM ARSENIDES; MATERIALS; PEAKS; QUANTUM WIRES; RAMAN SPECTROSCOPY; SIMULATION; SPATIAL RESOLUTION; X-RAY SPECTROSCOPY