Journal ArticleDOI
Renormalized polarizability in the Maxwell Garnett theory
TLDR
A renormalized polarizability is obtained for spheres embedded in a homogeneous matrix within the dipolar long-wavelength approximation with a relationship similar to the Clausius-Mossotti relation and it obeys a second-order algebraic equation.Abstract:
We develop a simple theory for the macroscopic dielectric function of a system of identical spheres embedded in a homogeneous matrix within the dipolar long-wavelength approximation. We obtained a relationship similar to the Clausius-Mossotti relation, but with a renormalized polarizability for the spheres instead of the bare polarizability. This renormalized polarizability obeys a second-order algebraic equation and it is given in terms of the bare polarizability, the volume fraction, and a functional of the two-particle correlation function of the spheres. We calculate the optical properties of metallic spheres within an insulating matrix and we compare our results with previous theories and with experiment.read more
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Electromagnetic properties of small-particle composites
TL;DR: In this paper, the effects of fractal morphology, such as a localization of dipolar eigenmodes and large fluctuations of local fields, are analyzed, and linear and non-linear optical properties of small-particle aggregates are considered.
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Dielectric relaxation in metal-coated particles: the dramatic role of nano-scale coatings
TL;DR: In this article, experimental results were presented in which the dielectric relaxation is shifted to microwave frequencies as a result of using metal-coated dielectrics with a nano-scale coating thickness, which is attributed to non-uniformity of the coating thickness and a consequent distribution of coating conductivity.
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Effective Optical Properties of Plasmonic Nanocomposites
Christoph Etrich,Stephan Fahr,Mehdi Keshavarz Hedayati,Franz Faupel,Mady Elbahri,Carsten Rockstuhl,Carsten Rockstuhl +6 more
TL;DR: This work uses full wave optical simulations to assign effective properties to plasmonic nanocomposites with filling fractions close to the percolation threshold and shows that these effective properties can be used to properly predict the optical action of functional devices that contain nanocomPOSites in their design.
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Inhomogeneous and anisotropic particles in optical traps: Physical behaviour and applications
TL;DR: In this paper, the relationship between particle geometry, composition and trap properties is discussed, and a range of associated metrological techniques are discussed, as well as experimental and theoretical properties of optical tweezers.
Journal ArticleDOI
Finite-element simulation of the depolarization factor of arbitrarily shaped inclusions.
TL;DR: These findings suggest that the DF for a 2-D inclusion is highly tunable depending on the choice of these parameters, and can provide a useful insight for the design of artificial two-phase heterostructures with specific polarization properties.