Fröhlich modes in GaN columnar nanostructures Article

Tiginyanu, IM, Sarua, A, Irmer, G et al. (2001). Fröhlich modes in GaN columnar nanostructures . PHYSICAL REVIEW B, 64(23), 10.1103/PhysRevB.64.233317

cited authors

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

authors

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 (formula presented) 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. © 2001 The American Physical Society.

publication date

  • January 1, 2001

published in

Digital Object Identifier (DOI)

volume

  • 64

issue

  • 23