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Campo DC | Valor | Lengua/Idioma |
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dc.contributor.author | Coso, Raúl del | - |
dc.contributor.author | Requejo-Isidro, José | - |
dc.contributor.author | Solís Céspedes, Javier | - |
dc.contributor.author | Gonzalo, J. | - |
dc.contributor.author | Afonso, Carmen N. | - |
dc.date.accessioned | 2012-02-16T13:12:43Z | - |
dc.date.available | 2012-02-16T13:12:43Z | - |
dc.date.issued | 2004-02-19 | - |
dc.identifier.citation | Journal of Appled Physics 95(5): 2755-2762 (2004) | es_ES |
dc.identifier.issn | 0021-8979 | - |
dc.identifier.uri | http://hdl.handle.net/10261/45757 | - |
dc.description | 8 pags. ; 5 figs. | es_ES |
dc.description.abstract | The third order optical susceptibility of metal-dielectric nanocomposite films (Cu:Al₂O₃) has been determined by degenerate four wave mixing. The films have been synthesized by alternate pulsed laser deposition and consisted of Cu nanoparticles in an amorphous Al₂O₃ matrix. They have metal volume fractions, p, ranging from 0.07 to 0.45, and morphologies that range from spherical particles (diameter, ⌀~2 nm) to a random network when close to the percolation threshold. In nanocomposites containing isolated oblate spheroids (p≤0.17), the optical response at wavelengths close to that of the surface plasmon resonance (SPR) can be described in the frame of the Maxwell-Garnett effective medium theory. Above the particle coalescence threshold, in nanocomposites with higher Cu content (p≥0.2), both the linear absorption in the near-infrared and the third order nonlinear optical susceptibility at the SPR are greatly enhanced, the latter achieving values as high as 1.8X10⁻⁷ esu. These results are discussed in terms of multipolar interactions among particles and giant local resonance effects that appear as a consequence of the particle coalescence and the increase in size of the nanocrystals. | es_ES |
dc.description.sponsorship | This work has been partially supported by the Comunidad Autónoma de Madrid (C.A.M. project No. 07T/0038/ 98), by CICYT (TIC1999-0866) and MCyT (TIC2002- 03235). | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | American Institute of Physics | es_ES |
dc.rights | openAccess | es_ES |
dc.subject | [PACS] Collective excitations (including excitons, polarons, plasmons and other charge-density excitations) | es_ES |
dc.subject | [PACS] Fine-particle systems | es_ES |
dc.subject | [PACS] Beam trapping, self-focusing and defocusing; self-phase modulation | es_ES |
dc.title | Third order nonlinear optical susceptibility of Cu:Al₂O₃ nanocomposites: from spherical nanoparticles to the percolation threshold | es_ES |
dc.type | artículo | es_ES |
dc.identifier.doi | 10.1063/1.1643779 | - |
dc.description.peerreviewed | Peer reviewed | es_ES |
dc.relation.publisherversion | http://dx.doi.org/10.1063/1.1643779 | es_ES |
dc.identifier.e-issn | 1089-7550 | - |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.openairetype | artículo | - |
item.fulltext | With Fulltext | - |
item.languageiso639-1 | en | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
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