Highly Polarized Raman Scattering Anisotropy in Single GaN Nanowires

Journal Article · Mon Mar 01 04:00:00 EST 2010 · Applied Physics Letters

OSTI ID:1040357

Sutter, E; Schäfer-Nolte, E O; Stoica, T; Gotschke, T; Limbach, F; Sutter, P; Calarco, R

Single GaN nanowires and larger GaN ensembles are investigated by Raman spectroscopy. Spectra of nanowire ensembles prove the high crystal quality and are in agreement with selection rules for the wurtzite structure. Single nanowires are studied with a spatial resolution of the order of 400 nm for different polarization directions of the incident laser beam relative to the nanowire axis. In the single wire spectrum, only the A{sub 1}(TO) was observed and the Raman intensity was suppressed for perpendicular polarization. These results confirm that Raman scattering in isolated GaN nanowires is governed by size effects.

• Research Organization: Brookhaven National Laboratory (BNL) Center for Functional Nanomaterials
• Sponsoring Organization: USDOE SC OFFICE OF SCIENCE (SC)
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 1040357
• Report Number(s): BNL--91151-2010-JA; KC020401H
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 9 Vol. 96; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ANISOTROPY
GALLIUM COMPOUNDS
LASERS
POLARIZATION
RAMAN SPECTRA
RAMAN SPECTROSCOPY
SCATTERING
SELECTION RULES
SPATIAL RESOLUTION
SPECTRA
functional nanomaterials