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RESEARCH PRODUCT
Photoluminescence and Raman spectroscopy of MBE‐grown InN nanocolumns
Núria GarroJ. MalindretosA. RizziAndrés CantareroFlorian WernerChristian DenkerJ. Segura-ruizsubject
PhotoluminescenceChemistryPhononAnalytical chemistryInfrared spectroscopy02 engineering and technology021001 nanoscience & nanotechnologyCondensed Matter PhysicsEpitaxy01 natural sciencesLaser linewidthsymbols.namesake0103 physical sciencessymbols010306 general physics0210 nano-technologyRaman spectroscopyLuminescenceMolecular beam epitaxydescription
InN nanocolumns grown under different conditions by plasma-assisted molecular beam epitaxy on p-Si (111) substrates are studied by micro-Raman and photoluminescence (PL) spectroscopies. The nanocolumns are free of strain and have an improved crystal quality as shown by the frequency and linewidth of the nonpolar E2h mode. Uncoupled polar modes coexist with a couple LO phonon-plasmon mode and are sensitive to the nanocolumn morphology. Variations in the growth conditions also modify the PL spectra significantly. An increase in the PL energy also involves a reduction of the integrated intensity and an increase of the PL linewidth. This overall phenomenology highlights the role of the surface accumulation layer in these nanostructures. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
year | journal | country | edition | language |
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2008-05-01 | physica status solidi c |