Two-photon photoluminescence from hierarchical ZnO nanostructures
Hierarchical ZnO nanostructures (such as nanowires, nanocombs and nanohedgehogs) were grown by means of a vapor-phase transport technique in a tubular furnace. Silicon based substrates were used, over which Au nanoclusters were deposited as growth catalyzers. We study the two-photon absorption induc...
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paper:paper_19385862_v45_n5_p67_Grinblat2023-06-08T16:32:11Z Two-photon photoluminescence from hierarchical ZnO nanostructures Capeluto, María Gabriela Bragas, Andrea Verónica Au nanoclusters Excitation sources Fabry-Perot Free-exciton emissions Incident polarization Multiple reflections Nano-objects Nanocombs Phonon replica Silicon-based Tubular furnaces Two photon Two-photon absorptions UV region Vapor phase transport ZnO ZnO nanostructures Gold deposits Nanotechnology Nanowires Photoluminescence Two photon processes Zinc oxide Hierarchical ZnO nanostructures (such as nanowires, nanocombs and nanohedgehogs) were grown by means of a vapor-phase transport technique in a tubular furnace. Silicon based substrates were used, over which Au nanoclusters were deposited as growth catalyzers. We study the two-photon absorption induced photoluminescence (TPPL) from the various ZnO nanoobjects grown using a micrometer sized polarised laser beam as the excitation source. The UV region of the TPPL spectra contains various peaks whose different patterns depend on the type of nanostructure and its orientation with respect to the incident polarization. We identify the peaks in the TPPL spectra, which are found to be dominated by free exciton emission and their phonon replicas. For the nanocomb, however, Fabry-Perot modes originating from optical multiple reflections within the comb's teeth are demonstrated. ©The Electrochemical Society. Fil:Capeluto, M.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bragas, A.V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19385862_v45_n5_p67_Grinblat http://hdl.handle.net/20.500.12110/paper_19385862_v45_n5_p67_Grinblat |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Au nanoclusters Excitation sources Fabry-Perot Free-exciton emissions Incident polarization Multiple reflections Nano-objects Nanocombs Phonon replica Silicon-based Tubular furnaces Two photon Two-photon absorptions UV region Vapor phase transport ZnO ZnO nanostructures Gold deposits Nanotechnology Nanowires Photoluminescence Two photon processes Zinc oxide |
| spellingShingle |
Au nanoclusters Excitation sources Fabry-Perot Free-exciton emissions Incident polarization Multiple reflections Nano-objects Nanocombs Phonon replica Silicon-based Tubular furnaces Two photon Two-photon absorptions UV region Vapor phase transport ZnO ZnO nanostructures Gold deposits Nanotechnology Nanowires Photoluminescence Two photon processes Zinc oxide Capeluto, María Gabriela Bragas, Andrea Verónica Two-photon photoluminescence from hierarchical ZnO nanostructures |
| topic_facet |
Au nanoclusters Excitation sources Fabry-Perot Free-exciton emissions Incident polarization Multiple reflections Nano-objects Nanocombs Phonon replica Silicon-based Tubular furnaces Two photon Two-photon absorptions UV region Vapor phase transport ZnO ZnO nanostructures Gold deposits Nanotechnology Nanowires Photoluminescence Two photon processes Zinc oxide |
| description |
Hierarchical ZnO nanostructures (such as nanowires, nanocombs and nanohedgehogs) were grown by means of a vapor-phase transport technique in a tubular furnace. Silicon based substrates were used, over which Au nanoclusters were deposited as growth catalyzers. We study the two-photon absorption induced photoluminescence (TPPL) from the various ZnO nanoobjects grown using a micrometer sized polarised laser beam as the excitation source. The UV region of the TPPL spectra contains various peaks whose different patterns depend on the type of nanostructure and its orientation with respect to the incident polarization. We identify the peaks in the TPPL spectra, which are found to be dominated by free exciton emission and their phonon replicas. For the nanocomb, however, Fabry-Perot modes originating from optical multiple reflections within the comb's teeth are demonstrated. ©The Electrochemical Society. |
| author |
Capeluto, María Gabriela Bragas, Andrea Verónica |
| author_facet |
Capeluto, María Gabriela Bragas, Andrea Verónica |
| author_sort |
Capeluto, María Gabriela |
| title |
Two-photon photoluminescence from hierarchical ZnO nanostructures |
| title_short |
Two-photon photoluminescence from hierarchical ZnO nanostructures |
| title_full |
Two-photon photoluminescence from hierarchical ZnO nanostructures |
| title_fullStr |
Two-photon photoluminescence from hierarchical ZnO nanostructures |
| title_full_unstemmed |
Two-photon photoluminescence from hierarchical ZnO nanostructures |
| title_sort |
two-photon photoluminescence from hierarchical zno nanostructures |
| publishDate |
2012 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19385862_v45_n5_p67_Grinblat http://hdl.handle.net/20.500.12110/paper_19385862_v45_n5_p67_Grinblat |
| work_keys_str_mv |
AT capelutomariagabriela twophotonphotoluminescencefromhierarchicalznonanostructures AT bragasandreaveronica twophotonphotoluminescencefromhierarchicalznonanostructures |
| _version_ |
1768542007590912000 |