Fröhlich modes in GaN columnar nanostructures

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

doi:10.1103/PhysRevB.64.233317

Fröhlich modes in GaN columnar nanostructures

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

School of Physics

Research output: Contribution to journal › Article (Academic Journal) › peer-review

68 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 contribution	Fröhlich modes in GaN columnar nanostructures
Original language	English
Pages (from-to)	1 - 3
Number of pages	3
Journal	Physical Review B: Condensed Matter and Materials Physics
Volume	64 (23, 233317)
DOIs	https://doi.org/10.1103/PhysRevB.64.233317
Publication status	Published - Nov 2001

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Publisher: The American Physical Society

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http://link.aps.org/abstract/PRB/v64/e233317

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title = "Fr{\"o}hlich modes in GaN columnar nanostructures",

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 Fr{\"o}hlich character of this mode.",

author = "IM Tiginyanu and A Sarua and G Irmer and J Monecke and SM Hubbard and D Pavlidis and V Valiaev",

note = "Publisher: The American Physical Society",

year = "2001",

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doi = "10.1103/PhysRevB.64.233317",

language = "English",

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TY - JOUR

T1 - Fröhlich modes in GaN columnar nanostructures

AU - Tiginyanu, IM

AU - Sarua, A

AU - Irmer, G

AU - Monecke, J

AU - Hubbard, SM

AU - Pavlidis, D

AU - Valiaev, V

N1 - Publisher: The American Physical Society

PY - 2001/11

Y1 - 2001/11

N2 - 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.

AB - 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.

U2 - 10.1103/PhysRevB.64.233317

DO - 10.1103/PhysRevB.64.233317

M3 - Article (Academic Journal)

SN - 1098-0121

VL - 64 (23, 233317)

SP - 1

EP - 3

JO - Physical Review B: Condensed Matter and Materials Physics

JF - Physical Review B: Condensed Matter and Materials Physics

ER -

Fröhlich modes in GaN columnar nanostructures

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