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dc.contributor.author
Bragas, Andrea Veronica
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dc.contributor.author
Aku-Leh, Cynthia
dc.contributor.author
Merlin, Roberto
dc.date.available
2019-03-18T16:26:33Z
dc.date.issued
2006-12
dc.identifier.citation
Bragas, Andrea Veronica; Aku-Leh, Cynthia; Merlin, Roberto; Raman and ultrafast optical spectroscopy of acoustic phonons in Cd Te0.68 Se0.32 quantum dots; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 73; 12; 12-2006; 1-5
dc.identifier.issn
1098-0121
dc.identifier.uri
http://hdl.handle.net/11336/71862
dc.description.abstract
Acousticlike vibrations were observed in spontaneous Raman measurements on Cd Te0.68 Se0.32 quantum dots embedded in a borosilicate matrix and ascribed to the l=0, l=2, and l=1 modes of a spherical particle. Pump-probe stimulated Raman measurements on the same sample reveal only the symmetric l=0 mode, the frequency of which increases as the laser central energy moves to higher energies. Consistent with the strong dependence of the exciton energy on the particle size, such a behavior is attributed to resonant size-selective excitation of nanocrystallites whose absorption edge coincides with the central energy of the optical pulses. This selectivity, relying on the existence of double-resonant terms in the generation process, is not observed in spontaneous Raman scattering for which the resonances involve a single term. © 2006 The American Physical Society.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Physical Society
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.title
Raman and ultrafast optical spectroscopy of acoustic phonons in Cd Te0.68 Se0.32 quantum dots
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-03-15T18:50:08Z
dc.journal.volume
73
dc.journal.number
12
dc.journal.pagination
1-5
dc.journal.pais
Estados Unidos
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dc.journal.ciudad
Nueva York
dc.description.fil
Fil: Bragas, Andrea Veronica. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
dc.description.fil
Fil: Aku-Leh, Cynthia. Universite de Paris VI. Institut des Nanosciences de Paris; Francia
dc.description.fil
Fil: Merlin, Roberto. University of Michigan; Estados Unidos
dc.journal.title
Physical Review B: Condensed Matter and Materials Physics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1103/PhysRevB.73.125305
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