V Nonlinear Optics in Composite Materials: 1. Semiconductor and Metal Crystallites in Dielectrics

Flytzanis, C.; Hache, F.; Klein, M. C.; Ricard, D.; Roussignol, Philippe

doi:10.1016/s0079-6638(08)70009-x

Cited by 168 publications

(97 citation statements)

References 157 publications

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“…Thus, the electric field that acts on and polarizes the charges of these nanocrystals can be vastly different from the macroscopic Maxwell field. 1 The slight dif- ferences in the dielectric constants of the nanocrystals and the host in the Bi:Ge system within the studied wavelength range attenuate the existence of possible confinement effects.…”

Section: B Bi:al 2 O 3 Filmmentioning

confidence: 94%

“…21,22 In this approach it is imposed the vanishing of the forward scattering amplitude and all the terms of higher order than the dipolar one are neglected. 1 For the case of a dielectric containing metal nanoparticles with characteristic sizes less than the wavelength, the extinction coefficient k can be described as…”

Section: B Bi:al 2 O 3 Filmmentioning

confidence: 99%

“…Those formed by metallic nanocrystals embedded in dielectric matrices have received much attention due to their specific optical absorption ͑colored filter glasses͒, and more recently due to the large enhancement of the intrinsic electronic nonlinear susceptibility which makes them potential candidates for integrated all-optical devices. 1,2 Although the most studied metals have been Au, Cu, and Ag, an enhancement of the nonlinear optical properties has recently been reported for oxide glasses containing heavy metals such as Sb and Bi. 3 Nevertheless, the broad application of these kinds of compound systems requires the development of reliable techniques both to produce them as thin films and to characterize their optical properties, composition, and structure.…”

Section: Introductionmentioning

confidence: 99%

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Spectroscopic ellipsometry of composite thin films with embedded Bi nanocrystals

Serna

Sande²,

Ballesteros

et al. 1998

Journal of Applied Physics

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Spectroscopic ellipsometry together with an effective medium model is used to determine simultaneously the effective refractive index, thickness, and metal volume fraction of thin nanocomposite films. The films are formed by Bi nanocrystals embedded in amorphous matrices, either semiconducting ͑Ge͒ or dielectric (Al 2 O 3 ). For the Bi:Ge films ͑metal in an absorbing host͒, the values obtained for both the real and imaginary parts of the refractive index vary continuously from that of Ge to that of Bi. The metal contents determined from the ellipsometry analysis are in excellent agreement with those obtained from direct measurements of the composition. For the Bi:Al 2 O 3 films ͑metal in a nonabsorbing host͒, the extinction coefficient (k) exhibits a maximum around 360 nm which is related to the metal plasmon resonance frequency of Bi nanocrystals. The metal content determined from the ellipsometry analysis in this case is underestimated, probably due to interaction of the Bi crystals with the Al 2 O 3 host.

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Section: B Bi:al 2 O 3 Filmmentioning

confidence: 94%

Section: B Bi:al 2 O 3 Filmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spectroscopic ellipsometry of composite thin films with embedded Bi nanocrystals

Serna

Sande²,

Ballesteros

et al. 1998

Journal of Applied Physics

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“…58 59 After focusing on the effect of dielectric confinement on the third-order nonlinear optical response, let us glance at the intrinsic nanoparticle susceptibility. Surprisingly, very few theoretical works have been devoted to the value of (3) m χ in noble metal nanoparticles [57,58] after the pioneering studies of Flytzanis' group who identified and evaluated the different electronic contributions [47,48,56,59]. They first distinguished two pure nonlinear origins corresponding to intraband and interband transitions as in the linear case.…”

Section: 4mentioning

confidence: 99%

Gold nanoparticle assemblies: interplay between thermal effects and optical response

et al. 2008

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The optical response of materials based on gold nanoparticle assemblies depends on many parameters regarding both material morphology and light excitation characteristics. In this paper, the interplay between the optical and thermal responses of such media is particularly investigated under its theoretical aspect. Both conventional and original modeling approaches are presented and applied to concrete cases. We first show how the interaction of light with matrix-embedded gold nanoparticles can result in the generation of thermal excitations through different energy exchange mechanisms. We then describe how thermal processes can affect the optical response of a nanoparticle assembly. Finally, we connect both aspects and point out their involvement in the nonlinear optical response of nanocomposite media. This allows us to tackle two key issues in the field of third-order nonlinear properties of gold nanoparticles: The influence of the generalized thermal lens in the long laser pulse regime and the hot electron contribution to the gold particle intrinsic third-order susceptibility, including its spectral dispersion and intensity-dependence. Additionally, we demonstrate the possible significant influence of the heat carrier ballistic regime and phonon rarefaction in the cooling dynamics of an embedded gold nanoparticle subsequent to ultrafast pulsed laser excitation.

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“…[5] An increase in the nonlinear response of the composite near the surface plasmon resonance (SPR) frequency is expected with increasing volume fraction of metal. This enhancement is due to local field effects and is a consequence of dielectric confinement.…”

Section: Introductionmentioning

confidence: 99%

Optical Properties of Multi-Component Antimony-Silver Nanoclusters Formed in Silica by Sequential Ion Implantation

1995

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The linear and nonlinear optical properties of nanometer dimension metal colloids embedded in a dielecmc depend explicitly on the electronic structure of the metal nanoclusters. The ability to control the electronic structure of the nanoclusters may make it possible to tailor the optical properties for enhanced performance. By sequential implantation of different metal ion species multi-component nanoclusters can be formed with significantly different optical properties than single element metal nanoclusters. We report the formation of multi-component Sb/Ag nanoclusters in silica by sequential implantation of Sb and Ag. Samples were implanted with relative ratios of Sb to Ag of 1:l and 3:l. A second set of samples was made by single element implantations of Ag and Sb at the same energies and doses used to make the sequentially implanted samples. All samples were characterized using RBS and both linear and nonlinear optical measurements. The presence of both ions significantly modifies the optical properties of the composites compared to the single element nanocluster glass composites. In the sequentially implanted samples the optical density is lower, and the strong surface plasmon resonance absorption observed in the Ag implanted samples is not present. At the same time the nonlinear response of the these samples is larger than for the samples implanted with Sb alone, suggesting that the addition of Ag can increase the nonlinear response of the Sb particles formed. The results are consistent with the formation of multi-component Sb/Ag colloids.

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V Nonlinear Optics in Composite Materials: 1. Semiconductor and Metal Crystallites in Dielectrics

Cited by 168 publications

References 157 publications

Spectroscopic ellipsometry of composite thin films with embedded Bi nanocrystals

Spectroscopic ellipsometry of composite thin films with embedded Bi nanocrystals

Gold nanoparticle assemblies: interplay between thermal effects and optical response

Optical Properties of Multi-Component Antimony-Silver Nanoclusters Formed in Silica by Sequential Ion Implantation

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