Porous Multilayers as a Dielectric Host for Photons Manipulation

2019 ◽  
Vol 16 (3) ◽  
pp. 307-321 ◽  
Author(s):  
Mher Ghulinyan ◽  
Lorenzo Pavesi
Keyword(s):  
Dielectric Host

Effect Magneto – Optic on Ferromagnetic Nanoparticle Polymer Composite Films

2021 ◽  
Vol 19 (6) ◽  
pp. 25-29
Author(s):  
Zaid A. Hasan
Keyword(s):  
Magnetic Field ◽  
Optical Properties ◽  
Nickel Ferrite ◽  
Magnetic Field Intensity ◽  
Optical Rotation ◽  
Composite Films ◽  
Nonlinear Dependence ◽  
Ferromagnetic Nanoparticles ◽  
Dielectric Host ◽  
Magneto Optic

Optical properties of a composite material made of ferromagnetic matel nanoparticles embedded in dielectric host are studied. A nonlinear dependence of the optical rotation on magnetic field resulting from the reorientation of nanoparticles is demonstrated. The data of optical properties finding were applied to the magneto – optic experimental data of nickel ferrite (NiFe2 O4) ferromagnetic nanoparticles embedded in polymer (PMMA) host. The magneto – optic is applied at wavelength (540 nm) and magnetic field intensity (450 m T), from result we found the affect magneto – optical on samples.

SUPERCONDUCTIVITY IN YBa2Cu3O7−δCOPPER OXIDE CERAMIC

1992 ◽  
Vol 06 (27) ◽  
pp. 1729-1735 ◽  
Author(s):  
A.C. SHARMA ◽  
INA KULSHRESTHA
Keyword(s):  
Simple Model ◽  
Model Calculation ◽  
Carrier Density ◽  
Coupling Parameter ◽  
Charge Carriers ◽  
Oxide Ceramic ◽  
Two Dimensional ◽  
Coupling Theory ◽  
Long Wavelength ◽  
Dielectric Host

A simple model calculation of Tc, based on the strong coupling theory of superconducti vity, has been performed for YBa2Cu3O7−δ, which is modelled to be a periodic array of conducting two-dimensional copper oxide planes embedded in a dielectric host. The pairing of charge carriers is assumed to take place via exchange of long wavelength bosons. To calculate Tc, we performed a simple model calculation of the carrier density of states (No), effective Coulomb interaction (μ*) and coupling parameter (λ). Our computed Tc as a function of δ is then compared with the experimental data.

Properties and Design of Electrorheological Suspensions

MRS Bulletin ◽  
1998 ◽  
Vol 23 (8) ◽  
pp. 35-42 ◽  
Author(s):  
Hans Conrad
Keyword(s):  
Shear Stress ◽  
Maximum Shear Stress ◽  
Full Potential ◽  
The Status ◽  
Order Of Magnitude ◽  
Proper Design ◽  
Organic Particles ◽  
Er Fluids ◽  
Electrorheological Suspensions ◽  
Dielectric Host

Although electrorheological (ER) fluids are presently being used in some commercial devices, their full potential has yet to be realized. The maximum shear stress (~2 kPa) of commercial ER fluids is not sufficient for most pertinent applications, especially in regard to the automotive industry. However, recent theoretical studies indicate that a shear stress of at least an order of magnitude greater than 2 kPa might be attained by the proper design of the ER suspension. This article reviews the status of the understanding of ER behavior which leads to this possibility.Most of the research to date on ER fluids has been on suspensions of either inorganic or organic particles in dielectric host oils. Hence, the present review will deal mainly with such “heterogeneous” ER fluids. However, in recent years interesting results have been reported for all-liquid ER fluids, especially those containing liquid crystals. These “homogeneous” ER fluids are discussed in the article by Inoue et al. in this issue.

scholarly journals Slow and Fast Lights in Metal/Dielectric Composite of Cylindrical Nanoinclusions in Passive and Active Linear Dielectric Host Matrices

2021 ◽  
Vol 66 (4) ◽  
pp. 281
Author(s):  
Y.A. Abbo
Keyword(s):  
Group Velocity ◽  
Light Pulse ◽  
Extreme Values ◽  
Small Distance ◽  
Numerical Results ◽  
Speed Of Light ◽  
Host Matrix ◽  
Dielectric Composite ◽  
Host Matrices ◽  
Dielectric Host

This paper presents theoretical discussions and computational numerical results obtained from the study of extreme values of the speed of light in metal/dielectric composite, where the cylindrical nanoinclusions are uniformly distributed in the linear dielectric host matrix. The results testify that, within our approach, at the region of anomalous dispersion, light can travel with a group velocity greater than the speed of light in vacuum. In a composite with passive host matrix, the light pulse is absorbed within a very small distance. The problem of absorption can be reduced considerably by using an active host matrix.

Analysis of the polarizability of an array of spherical metallic inclusions in a dielectric host sphere

2014 ◽  
Vol 31 (11) ◽  
pp. 2409 ◽  
Author(s):  
Fabio Mangini ◽  
Nicola Tedeschi ◽  
Fabrizio Frezza ◽  
Ari Sihvola
Keyword(s):  
Metallic Inclusions ◽  
Dielectric Host

Enhanced and controllable nonlinear effects in composite with aligned gold spheroid arrays

2015 ◽  
Vol 24 (01) ◽  
pp. 1550013 ◽  
Author(s):  
Libing Ye ◽  
Jun Guo ◽  
Leyong Jiang ◽  
Xiaoyu Dai
Keyword(s):  
Optical Properties ◽  
Nonlinear Effects ◽  
Prolate Spheroid ◽  
Nonlinear Susceptibility ◽  
Third Order ◽  
Depolarization Factor ◽  
Nanoparticle Shape ◽  
Linear Optical Properties ◽  
Dielectric Host ◽  
Third Order Nonlinear Susceptibility

The linear and nonlinear optical properties of composite containing aligned prolate spheroid nanoparticles embedded in a dielectric host are studied as a function of depolarization factor. It is shown that the effective third-order nonlinear susceptibility of the composite can be significantly enhanced with respect to the linear optical properties, due to a combination of varying nanoparticle shape and interparticle space. The susceptibility enhancement is up to four orders larger compared to the spherical case. The susceptibility enhancement of the host is finally comparable to the inclusion after choosing property structure parameters. The geometry-dependent susceptibility enhancement can lead to an improved figure of merit for nonlinear absorption.

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