Failure of local Mie theory: optical spectra of colloidal aggregates

Pack, Alden; Hietschold, Michael; Wannemacher, Reinhold

doi:10.1016/s0030-4018(01)01310-4

Cited by 65 publications

(72 citation statements)

References 36 publications

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“…shows that nonlocal effect due to excitation of volume plasmon is negligible for two silver spheres of diameter d = 10 nm when the surface-to-surface spacing σ > 0.4 nm. 10 In our present work, σ > 2 nm in glass (corresponding to σ > 3.2 nm in air) for all the cases we considered. Therefore, this nonlocal effect should not be a major correction on our results.…”

Section: Discussionmentioning

confidence: 65%

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A computational study of the optical response of strongly coupled metal nanoparticle chains

Fung

Chan

2008

Optics Communications

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We study the optical responses of metal nanoparticle chains. Multiple scattering calculations are used to study the extinction cross sections of silver nanosphere chains of finite length embedded in a glass matrix. The transmission and reflection coefficients of periodic 2D arrays of silver nanospheres are also calculated to understand the interaction between nanoparticle chains. The results are in agreement with recent experiments. The splitting of plasmon-resonance modes for different polarizations of the incident light are explored. Results on the effect of disorder are also presented.

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Section: Discussionmentioning

confidence: 65%

“…For metal nanoparticles with diameters d ∼ 10 nm, there were studies that focused on nanoparticle dimers [8][9][10] and small clusters 11,12 . For chains 13 of metal nanoparticles of such a size range, experimentally and theoretically obtained optical extinction spectra were compared by Sweatlock et.…”

Section: Introductionmentioning

confidence: 99%

A computational study of the optical response of strongly coupled metal nanoparticle chains

Fung

Chan

2008

Optics Communications

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“…The dielectric constant equals that of a plasma, (ω) = 1−ω 2 p /ω 2 , where ω p is the plasma frequency of the electron gas inside the cluster [49]. Hence, the (Fröhlich) resonance takes place at ω ν = ω p / √ 3, whereas the coefficient is modified as the shape of a cluster deviates from spherical [51,52].…”

Section: A Atomic Clustermentioning

confidence: 99%

Nonadiabatic ponderomotive potentials

Dodin

Fisch

2006

Physics Letters A

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An approximate integral of the Manley-Rowe type is found for a particle moving in a highfrequency field, which may interact resonantly with natural particle oscillations. An effective ponderomotive potential is introduced accordingly and can capture nonadiabatic particle dynamics. We show that nonadiabatic ponderomotive barriers can trap classical particles, produce cooling effect, and generate one-way walls for resonant species. Possible atomic applications are also envisioned.

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“…In [14]- [17] this interesting case was not actually considered, and the paper [19] being especially devoted to that problem, turned out to be misleading. Basing on the numerical consideration of one of the particular cases, the conclusion was made in [20] about failure of the Mie theory for the closely set nanospheres.…”

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confidence: 99%

Strongly localized plasmon oscillations in a cluster of two metallic nanospheres and their influence on spontaneous emission of an atom

Климов

Гузатов

2007

Phys. Rev. B

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The plasmon oscillations in a cluster of two metallic nanospheres are studied theoretically. Particular attention is paid to the case of nearly touching spheres. Simple analytical expressions have been found for the spectra of plasmon oscillations of different symmetry in this case. A new type of the plasmon oscillations, which are strongly localized between the spheres, and which totally disappear at separation of the spheres, has been discovered. The found plasmon oscillations have a dramatic effect on optical properties of an atom localized between the spheres.Much attention has been paid, of late, to the experimental and theoretical study of optical properties of the metallic nanoparticles. This interest is mainly due to a considerable enhancement of local fields near the nanoparticles. An especially high increase occurs in the case of plasmon polariton resonances ("plasmons") [1,2] or phonon polariton resonances ("phonons") [3]. On the basis of this effect one considers quite a number of possible applications. One of the most developed is the use of large local fields for enhancement of the Raman scattering cross-section [4]. Recent experiments have shown that such an increase may achieve 10-14 orders of magnitude, which may help to resolve separate molecules [5]- [7]. The local enhancement of the fields can also be used to increase the fluorescence intensity and to determine the structure of a single DNA strand without using the fluorescent labels [8,9]. By using the nanoparticles of complex configuration one can provide enhancement of both the absorption and the emission of light by natural and artificial fluorophores [10]. Of particular interest and promise are the studies of optical properties of the clusters of two and more metallic nanoparticles, because by changing the cluster's geometry one can effectively control the spectra of the plasmon oscillations. This effect makes it possible to produce, for example, new types of biosensors [11]-[13]. A whole series of experimental [14]-[17] and theoretical [18]-[27] studies have been devoted to the two-particle clusters.

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Failure of local Mie theory: optical spectra of colloidal aggregates

Cited by 65 publications

References 36 publications

A computational study of the optical response of strongly coupled metal nanoparticle chains

A computational study of the optical response of strongly coupled metal nanoparticle chains

Nonadiabatic ponderomotive potentials

Strongly localized plasmon oscillations in a cluster of two metallic nanospheres and their influence on spontaneous emission of an atom

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