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Micro‐Raman study of columnar GaAs nanostructures
Author(s) -
Prunici Pavel,
Irmer Gert,
Monecke Jochen,
Sirbu Lilian,
Tiginyanu Ion
Publication year - 2005
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200461183
Subject(s) - raman spectroscopy , dielectric function , raman scattering , plasmon , phonon , nanostructure , dielectric , materials science , condensed matter physics , scattering , molecular physics , optics , optoelectronics , nanotechnology , chemistry , physics
Micro‐Raman scattering spectra of bulk and porous GaAs and of individual nanocolumns were studied. The GaAs nanocolumns have radii of 50–100 nm and lengths between 5 and 25 µm. The experimental data are compared with the results of calculations predicting coupled LO‐phonon–plasmon and coupled Fröhlich‐plasmon modes using a dielectric function derived on the basis of an appropriate two‐dimensional effective medium theory. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)