Fröhlich modes in GaN columnar nanostructures

IM Tiginyanu, A Sarua, G Irmer, J Monecke, SM Hubbard, D Pavlidis, V Valiaev

Research output: Contribution to journalArticle (Academic Journal)

62 Citations (Scopus)

Abstract

GaN columnar nanostructures fabricated by electrochemical dissolution of bulk material have been studied by micro-Raman spectroscopy. The anodization induces an increase in the intensity of Raman scattering accompanied by a breakdown of the polarization selection rules and by the appearance of a new mode at 716 cm-1, i.e., in the frequency gap between the transverse optical and longitudinal optical bulk phonons. We present a Raman line-shape analysis based on the effective dielectric function of a composite that brings to light the Fröhlich character of this mode.
Translated title of the contributionFröhlich modes in GaN columnar nanostructures
Original languageEnglish
Pages (from-to)1 - 3
Number of pages3
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume64 (23, 233317)
DOIs
Publication statusPublished - Nov 2001

Bibliographical note

Publisher: The American Physical Society

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