Coupling localized and extended plasmons to improve the light extraction through metal films

Cesario, Jean; González, Marı́a Ujué; Cheylan, S.; Barnes, William; Enoch, Stefan; Quidant, Romain

doi:10.1364/oe.15.010533

Cited by 57 publications

(38 citation statements)

References 18 publications

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“…8,9 The incorporation of plasmonic nanostructures over surfaces can be used to enhance functionalities and improve their properties. Thin films are commonly used in molecular detection 5 while gold nanoparticles can increase the efficiency of photovoltaic panels, 10,11 photocatalytic surfaces, 12,13 or biological entities labeling devices.…”

Section: Introductionmentioning

confidence: 99%

Extended and Localized Surface Plasmons in Annealed Au Films on Glass Substrates

Serrano¹

2015

Springer Theses

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We present here a study on the surface plasmon resonance ͑SPR͒ in Au films deposited onto glass substrates and annealed in air at different temperatures. The initial Au films exhibit the resonant absorption of extended surface plasmons which depends on the film thickness. Thermal treatments promote the modification of the continuous films toward the formation of Au isolated islands. The morphological features of the islands depend on the film initial thickness and annealing temperature. The optical properties of the films are qualitatively modified as a consequence of the morphological changes. For films with initial thickness below 30 nm, the islands exhibit localized SPR while thicker films lead to islands large enough to hold extended SPR.

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Section: Introductionmentioning

confidence: 99%

Extended and Localized Surface Plasmons in Annealed Au Films on Glass Substrates

Serrano¹

2015

Springer Theses

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“…However, the interaction between an ever-growing number of higher order localized plasmon resonances and a SPP resonance continuum has yet to be discussed. Specifically, it is well known that coupling between a localized surface plasmon (LSP) resonance and a SPP continuum leads to an observable anticrossing at the LSP resonance frequency [7,8,[12][13][14][15][16][17][18][19][20][21]. What is not clear, however, is if this still holds true for a large number of localized resonances, as will be investigated in this Letter.…”

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confidence: 88%

Coupling of multiple LSP and SPP resonances: interactions between an elongated nanoparticle and a thin metallic film

2013

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We study the coupling interactions between a progressively elongated silver nanoparticle and a silver film on a glass substrate. Specifically, we investigate how the coupling between localized surface plasmons (LSPs) and propagating surface plasmon polaritons (SPPs) is influenced by nanoparticle length. Although the multiple resonances supported by the nanoparticle are effectively standing wave surface plasmons, their interaction with the SPP continuum of the underlying Ag film indicates that their spectral response is still localized in nature. It is found that these LSP-SPP interactions are not limited to small particles, but that they are present as well for extremely long particles, with a transition to the SPP coupling interactions of a bilayer metallic film system beginning at a particle length of approximately 5 μm. Coupling of metallic nanostructures in plasmonic systems has been a topic of major research interest, as it leads to effects such as strong near-field confinement, useful for trapping, sensing, nonlinear interactions, and surface-enhanced Raman scattering [1][2][3][4][5][6]. Coupling between finite-size plasmonic nanostructures and a conductive film is of particular interest as it involves the interaction of discrete localized resonances with a continuum of delocalized surface plasmon polaritons (SPPs) [7][8][9][10][11]. Systems exhibiting coupling of just a few localized resonances with a delocalized continuum have already been researched [7,8]. However, the interaction between an ever-growing number of higher order localized plasmon resonances and a SPP resonance continuum has yet to be discussed. Specifically, it is well known that coupling between a localized surface plasmon (LSP) resonance and a SPP continuum leads to an observable anticrossing at the LSP resonance frequency [7,8,[12][13][14][15][16][17][18][19][20][21]. What is not clear, however, is if this still holds true for a large number of localized resonances, as will be investigated in this Letter. The system studied here consists of a 2D silver nanoparticle of 40 nm height and variable length L spaced 100 nm above a 50 nm thick Ag film on a SiO 2 substrate of refractive index n 1.46 [ Fig. 1(a)]. A 2D geometry was chosen since effects along the third dimension are irrelevant. We use the dielectric data for silver measured by Johnson and Christy [22]. The simulation method carried out in this study is based on Green's tensor formalism in 2D [23]. As shown in Fig. 1(a), a horizontally oriented electric dipole source placed 100 nm to the left of the particle is used for excitation. A study of the system response for a finite length L is made via the same Fourier analysis method as in a previous work [24]. The plots obtained display the magnitude of the parallel k-vector component k x at each given frequency. Note that use of this Fourier analysis method leads to an unavoidable spectral broadening in k-space, which is inversely proportional to the particle length L, but does not pose any limitation on the current study.The sampling...

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“…1,8,26 Both kinds of surface plasmons (SPs) have been thoroughly studied, however scarce research has been carried out at the cross-over region where LSPs and ESPs might coexist. 139,140 As explained in Section 2.2.2 of Chapter 2, metallic thin films deposited on substrates with poor adhesion can exhibit substantial morphological modifications when annealing is carried out in air. These modifications include the formation of hillocks, subsequent growing of the holes and island agglomeration leading to a discrete structure.…”

Section: Introductionmentioning

confidence: 99%

Modified Au-Based Nanomaterials Studied by Surface Plasmon Resonance Spectroscopy

Serrano

2015

Springer Theses

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A mis padres y hermanosA Raúl "La educación es el arma más poderosa para cambiar el mundo", Nelson Mandela, 1918-2013 "Experimental physics cannot do without instruments", Jean-Antoine Nollet, 1700-1770. AgradecimientosDurante el desarrollo de esta Tesis, muchas son las personas e instituciones involucradas a las que me gustaría dar las gracias. Sin su ayuda y apoyo, este trabajo no hubiera sido posible.En primer lugar quiero dar las gracias de manera muy especial al Dr. MiguelÁngel García y al Dr.Óscar Rodríguez por haberme dirigido la tesis. Un millón de gracias por creer en mí y haberme enseñado tanto, por motivarme, guiarme y ayudarme a crecer en el mundo de la investigación, por esos turnos en Spline, por los viajes, por esas charlas,... Ha sido una suerte contar con vosotros tanto en el trabajo como a nivel personal.Al Dr. Germán Castro. Gracias por aceptar la idea loca de montar un sistema de plasmones en la línea de absorción, por involucrarte como el que más, porque siempre estás disponible para hablar y enseñar ciencia. Por tu vitalidad y energía inagotable.Al Prof. José Francisco Fernández Lozano, por sus buenos consejos, su disposición, sus ideas y su dedicación. Gracias por introducirme en el mundo de la empresa e iniciarme en el campo de la cerámica.Al Prof. José Llopis por su gran ayuda en mis inicios y sus interesantes lecciones sobre plasmones. A la Dra. Noemí Carmona, por su buena disponiblidad yánimo. Gracias por acercarme a los vidrios históricos.Al Prof. Juan Rojo, a la Dra. Arantzazu Mascaraque, al Dr. MiguelÁngel González y todo el grupo de Ciencia de Superficies de la Universidad Complutense de Madrid, por hacerme siempre un hueco para medir en el AFM, por dejarme ir a hablaros de mi trabajo, por vuestras ideas, ayuda yánimo.También gustaría agradecer a la Dra. Mar García y a la Dra. Alicia de Andrés, del Instituto de Ciencia de Materiales de Madrid, por las medidas magnéticas (no presentadas en este trabajo) y por la discusión sobre las medidas Raman, respectivamente. A Charlie, porque no hay mejor compañía para trabajar en el laboratorio. A Eva, la nueva incorporación del grupo, que está más que integrada. A los que se han ido pero se dejan ver: Mara, Helen, Leti, Alberto A., Quique, Monikaka, Marta, MariCani,..., porque siempre es un buen momento estar con vosotr@s, dentro y fuera del trabajo. ¡Muchas gracias! De manera muy especial me gustaría dar las gracias a Esther y Cris, porque desde que empezamos la carrera siempre habéis estado ahí para apoyarme y tirar de mí cuando más lo necesitaba. Gracias Esther por coger el relevo y hacer de becaria por unos días. Por esos cotilleos, tan necesarios para empezar el día. Porque siempre puedo contar contigo y sabes sacar lo mejor de mí. Gracias Cris, porque siempre estás ahí para cualquier cosa.Porque sabes escuchar y animarme en los no mejores momentos. Porque vuestro esfuerzo y dedicación sólo merecen mi admiración. ¡Gracias chicas! A los del Sauco, por todos los buenos momentos vividos, las risas, los pre-extras, las carreras, porque con v...

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Coupling localized and extended plasmons to improve the light extraction through metal films

Cited by 57 publications

References 18 publications

Extended and Localized Surface Plasmons in Annealed Au Films on Glass Substrates

Extended and Localized Surface Plasmons in Annealed Au Films on Glass Substrates

Coupling of multiple LSP and SPP resonances: interactions between an elongated nanoparticle and a thin metallic film

Modified Au-Based Nanomaterials Studied by Surface Plasmon Resonance Spectroscopy

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