Studies on metal-dielectric plasmonic structures.

Chettiar, Uday K.; Liu, Zhengtong; Thoreson, Mark D.; Shalaev, Vladimir M.; Drachev, Vladimir P.; Pack, Michael Vern; Kildishev, Alexander V.; Nyga, Piotr

doi:10.2172/973344

Cited by 4 publications

(4 citation statements)

References 60 publications

(87 reference statements)

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“…We can see from figure 2(b) that the Drude model (purple lines, ω p = 7.75 eV and p = 0.29 eV) does not fit the extracted dielectric constant well, especially at high frequencies. Note that the damping rate is much larger than those obtained for bulk samples [22], consistent with the higher losses for the as-deposited Ag film.…”

Section: Dielectric Retrieval Of Ag Film By Shadowing Vapor Depositionsupporting

confidence: 78%

Modeling quasi-3D chiral metamaterials fabricated by shadowing vapor deposition

Leung

Han

et al. 2013

J. Opt.

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We report a transfer-matrix parameter retrieval method for extracting the dielectric constant of Ag film obtained by using a shadowing vapor deposition technique. The as-deposited Ag film, being amorphous/porous, exhibits higher losses as compared to a solid film. Using the retrieved dielectric constant for the as-deposited Ag film, we have calculated the transmittance, and hence the circular dichroism, of quasi-3D chiral metamaterials of Ag/PMMA columnar arrays fabricated by the shadowing vapor deposition method. We find very good agreement between the simulations and the experimental results using the extracted dielectric constant, much better than those calculated using standard values for solid Ag film.

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Section: Dielectric Retrieval Of Ag Film By Shadowing Vapor Depositionsupporting

confidence: 78%

Modeling quasi-3D chiral metamaterials fabricated by shadowing vapor deposition

Leung

Han

et al. 2013

J. Opt.

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Section: ■ Results and Discussionmentioning

confidence: 99%

“…The total scattering cross sections of the plasmonic nanoparticle are obtained by integrating the scattered power flux over a sphere surface outside it. To describe the gold metal, we use a Lorentz Model: where Γ p , ω p , f 1 , ω 1 , and Γ 1 are the relaxation rate, plasma frequency, weighting factor, Lorentz resonance width, and Lorentz oscillator damping rate, respectively. The specific values of these parameters can be found in ref , which are obtained by fitting the experimental data tabulated in literature, given the surrounding medium is water and the refractive index is 1.33.…”

Section: Resultsmentioning

confidence: 99%

“…To describe the gold metal, we use a Lorentz Model: where Γ p , ω p , f 1 , ω 1 , and Γ 1 are the relaxation rate, plasma frequency, weighting factor, Lorentz resonance width, and Lorentz oscillator damping rate, respectively. The specific values of these parameters can be found in ref , which are obtained by fitting the experimental data tabulated in literature, given the surrounding medium is water and the refractive index is 1.33. Scattering boundary conditions and perfectly matched layers were used to properly define the calculations.…”

Section: Resultsmentioning

confidence: 99%

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Single Anisotropic Plasmonic Nanoparticle Three-Dimensional Orientation Determination Based on Fano-Like Resonance and Universal 3D Orientation-Dependent Scattering Trait

Cheng

Kong

et al. 2015

J. Phys. Chem. C

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Single-nanoparticle orientation determination plays a vital role in studying complex nanoscale motion. In the present paper, we systematically investigate the threedimensional (3D) orientation-dependent far-and near-field optical properties of single (Au core)-(dielectric shell) nanorice and gold nanorod. It shows that the scattering spectrum of the single anisotropic nanoparticle with arbitrary orientation is a linear superposition of a set of basic scattered spectra. And the scattering spectra of the single nanorice show a polarizationdependent Fano-like resonance which can be well described by a model with two coupled oscillators. Furthermore, by means of coordinate transformation, a universal analytic formula for description single nanoparticle 3D orientation-and polarizationdependent scattering intensity is proposed. Then we develop a new method to detect the 3D orientation of single nanoparticle, that is, by fitting the scattering intensity under different incident polarization directions based on our analytic formula and the 3D orientations could be resolved explicitly. Both of the experimental and numerical simulation data can be well described by our analytical formula. Our method for single particle 3D orientation determination has high precision only with subdegree uncertainty. In addition, based on the Fano resonances caused by the efficient coupling between the dielectric elliptical shell and the gold nanoellipsoid core, we found that the 3D orientation of single nanorice could be confirmed from either the transverse or longitudinal plasmon mode polarization-dependent scattering trait, while it is almost impossible for single gold nanorod based on the transverse plasmon mode. It is worth noting that the transverse plasmon mode of the nanorice is mostly insensitive to the aspect ratio then it allows nanorices with different lengths to be 3D orientation sensors without altering the incident laser wavelength.

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Near-Infrared Super Resolution Imaging with Metallic Nanoshell Particle Chain Array

et al. 2013

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We propose a near-infrared super resolution imaging system without a lens or a mirror but with an array of metallic nanoshell particle chain. The imaging array can plasmonically transfer the near-field components of dipole sources in the incoherent and coherent manners and the super resolution images can be reconstructed in the output plane.By tunning the parameters of the metallic nanoshell particle, the plasmon resonance band of the isolate nanoshell particle red-shifts to the near-infrared region. The near-infrared super resolution images are obtained subsequently. We calculate the field intensity distribution at the different planes of imaging process using the finite element method and find that the array has super resolution imaging capability at near-infrared wavelengths.We also show that the image formation highly depends on the coherence of the dipole sources and the image-array distance.

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Studies on metal-dielectric plasmonic structures.

Cited by 4 publications

References 60 publications

Modeling quasi-3D chiral metamaterials fabricated by shadowing vapor deposition

Modeling quasi-3D chiral metamaterials fabricated by shadowing vapor deposition

Single Anisotropic Plasmonic Nanoparticle Three-Dimensional Orientation Determination Based on Fano-Like Resonance and Universal 3D Orientation-Dependent Scattering Trait

Near-Infrared Super Resolution Imaging with Metallic Nanoshell Particle Chain Array

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