Anisotropic optical properties of silver nanoparticle arrays on rippled dielectric surfaces produced by low-energy ion erosion

Camelio, S.; Babonneau, David; Lantiat, D.; Simonot, Lionel; Pailloux, F.

doi:10.1103/physrevb.80.155434

Cited by 71 publications

(86 citation statements)

References 40 publications

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“…The plasmonic layer was modeled as a collection of identical ellipsoids interacting by dipolar forces and placed in a rectangular lattice on the substrate. Under these assumptions, the in-plane and out-of-plane components become, respectively, 15,30,31 …”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Probing the out-of-plane optical response of plasmonic nanostructures using spectroscopic ellipsometry

Verre¹,

Fleischer²,

Smith³

et al. 2011

Phys. Rev. B

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A simplified approach to investigate the out-of-plane response of plasmonic nanostructures using spectroscopic ellipsometry (SE) is presented. One-dimensional self-assembled arrays of Ag nanoparticles (NP's) were grown on stepped Al 2 O 3 (0001), in ultrahigh vacuum, using deposition at a glancing angle. The SE response was measured with the plane of incidence aligned along, and across, the surface steps. From the raw data, an anisotropic surface excess function (ASEF) can be extracted, whose properties depend only on the dielectric function of the NP layer. Three resonances are clearly seen in the ASEF: two in-plane resonances, which correspond to the resonances measured using normal incidence reflection anisotropy spectroscopy, and the out-of-plane resonance. A dipole model is used to simulate the optical response of the NP layer, where the presence of the out-of-plane resonance provides an important additional constraint in developing the model.

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Section: Discussionmentioning

confidence: 99%

“…30 It is well known that this simple dipole approach overestimates the interaction with the substrate, and thus the plasmon redshift, for flattened NP's. 36,37 An analytical dipolar correction for an oblate spheroid 15,37 is applied here, as the appropriate expressions are not available for flattened ellipsoids.…”

Section: Discussionmentioning

confidence: 99%

Probing the out-of-plane optical response of plasmonic nanostructures using spectroscopic ellipsometry

Verre¹,

Fleischer²,

Smith³

et al. 2011

Phys. Rev. B

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show abstract

“…These nanostructured surfaces are found to be useful to act as a template to grow thin films and multilayers to tailor functional properties in controlled manner. [9][10][11][12][13][14][15][16][17] In general, ripple like structures are found to be formed, when a flat surface of any elemental solid is bombarded with ions at oblique angle of incidence. Bradley and Harper have given the first satisfactory theoretical explanation by considering the competition between surface instability caused by the curvature dependent sputtering and surface relaxation mechanism, so called B-H model.…”

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confidence: 99%

Investigation of the mechanism of impurity assisted nanoripple formation on Si induced by low energy ion beam erosion

Vayalil

Gupta

Roth³

et al. 2015

Journal of Applied Physics

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Articles you may be interested inA detailed mechanism of the nanoripple pattern formation on Si substrates generated by the simultaneous incorporation of pure Fe impurities at low energy (1 keV) ion beam erosion has been studied. To understand and clarify the mechanism of the pattern formation, a comparative analysis of the samples prepared for various ion fluence values using two complimentary methods for nanostructure analysis, atomic force microscopy, and grazing incidence small angle x-ray scattering has been done. We observed that phase separation of the metal silicide formed during the erosion does not precede the ripple formation. It rather concurrently develops along with the ripple structure. Our work is able to differentiate among various models existing in the literature and provides an insight into the mechanism of pattern formation under ion beam erosion with impurity incorporation. V C 2015 AIP Publishing LLC.[http://dx

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“…The technique is independent of the deposited material and could also be generalized to different substrates, obtained by patterning of the surface using low-angle ion sputtering. 12 The resulting structures present strong dichroic plasmonic resonances, and they offer themselves naturally as candidates for enhanced spectroscopy. The exact resonance energy required can be obtained by choosing the appropriate material and deposition parameters.…”

mentioning

confidence: 99%

“…1). [9][10][11][12][13][14] A collimated adatom flux is directed towards the steps, which act as preferential growth sites. Adatoms then diffuse along the steps and coalesce, forming NP arrays.…”

mentioning

confidence: 99%

Self-assembled broadband plasmonic nanoparticle arrays for sensing applications

Verre¹,

Fleischer²,

Ualibek³

et al. 2012

Applied Physics Letters

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Highly ordered noble metal nanoparticle (NP) arrays are produced using a glancing angle deposition on stepped substrates. The versatility of the technique is demonstrated by depositing different metals, resulting in shifts of the resonance positions. The behaviour of the NP arrays grown is predicted by a dipolar model, and it is measured using reflectance anisotropy spectroscopy (RAS). Fine tuning of the resonances can be finally realised by selecting the deposition parameters. The combined application of both RAS and deposition at glancing angles provides a unique tool to grow NP arrays with the tunable plasmonic resonances in the entire visible range. 3,4 For these spectroscopic techniques, the resonant energy of the structures needs to match the energy of the exciting laser.5 If the interparticle separation is smaller than the average NP diameter, 6 the electric field in the interstitial space is enhanced at resonance by orders of magnitude. 7The required NP arrangements can be readily obtained using lithographic techniques, 1 but these are unsuitable for the production of large scale active areas. Typical colloidal processes could be a solution, 8 but ordered deposition onto a substrate is required. The resulting optical spectra depend also on the parameters governing the coupling between NPs and on the morphology of the resulting structures. These growth methods are material specific and thus require unique preparation recipes, depending on the material utilised. Glancing angle deposition of adatoms can provide a possible solution (see Fig. 1).9-14 A collimated adatom flux is directed towards the steps, which act as preferential growth sites. Adatoms then diffuse along the steps and coalesce, forming NP arrays. This self-assembled technique is simple, easily scalable, and mainly dependent on geometrical considerations. It is then conceptually independent of the deposition material. This letter demonstrates that NP arrays of different materials can be produced using this deposition method. The resulting resonances can be tuned over the whole visible range once the material choice is combined with different deposition parameters. At the same time, reflectance anisotropy spectroscopy (RAS) can be used to monitor, in situ, the evolution of resonance profiles during the growth. Structures with a particular resonance energy suitable for enhancements spectroscopy can then be obtained following this route.Advantages in a material independent production method of NP arrays can be readily demonstrated by simulations. The anisotropic optical response can be reproduced by modelling each identical NP as a supported ellipsoid placed on a rectangular lattice. Once the dimensions involved are much smaller than the wavelength of light, the NP layer can be approximated as a continuous layer having an effective anisotropic in-plane dielectric function,where i ¼ (x,y), e s , and e m are the dielectric functions of the surrounding medium and of the metal, respectively. The standard shape depolarization factorthus taking into ac...

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Anisotropic optical properties of silver nanoparticle arrays on rippled dielectric surfaces produced by low-energy ion erosion

Cited by 71 publications

References 40 publications

Probing the out-of-plane optical response of plasmonic nanostructures using spectroscopic ellipsometry

Probing the out-of-plane optical response of plasmonic nanostructures using spectroscopic ellipsometry

Investigation of the mechanism of impurity assisted nanoripple formation on Si induced by low energy ion beam erosion

Self-assembled broadband plasmonic nanoparticle arrays for sensing applications

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