Backward waves leaving the metamaterial

2021 ◽  
pp. 116-122
Author(s):  
B.B. Averbukh ◽  
◽  
I.B. Averbukh ◽  
Keyword(s):  
Refractive Index ◽  
Finite Thickness ◽  
Negative Real Part ◽  
Magnetic Mirror ◽  
Plane Parallel ◽  
Medium Layer ◽  
Extinction Theorem

The medium is composed of plane-parallel monolayers consisting of Huygens elements. In the molecular optics model, expressions are obtained for the reflected field, the field in the medium, and (in the case of a layer of finite thickness) behind the medium. An extinction theorem is considered, and an expression for the refractive index is introduced. Under certain conditions, such a medium can behave like a medium with a unit, zero, or negative real part of the refractive index at a given frequency. The condition for the realization of a magnetic mirror is formulated. In the case of a medium layer of finite thickness, the exit of backward waves outside the medium is shown.

scholarly journals High-Sensitivity Biosensor-Based Enhanced SPR by ZnO/MoS2 Nanowires Array Layer with Graphene Oxide Nanosheet

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Shiliang Guo ◽  
Xiaogang Wu ◽  
Zhiquan Li ◽  
Kai Tong
Keyword(s):  
Finite Element Method ◽  
Refractive Index ◽  
High Sensitivity ◽  
Metal Nanowires ◽  
The Finite Element Method ◽  
Spr Biosensor ◽  
Coupling Structure ◽  
Graphene Oxide Nanosheet ◽  
Medium Layer ◽  
Nanowires Array

A novel SPR biosensor that can achieve a high sensitivity is proposed; therefore, a new prism coupling structure based on metal nanowires array layer is designed in this paper. The thickness of each medium layer for the structure is analyzed to obtain the optimal SPR spectrum, by the finite element method, so that the sensitivity is able to be enhanced greatly. The optimal thicknesses of each medium layer are given, and the sensitivity of the SPR biosensor can reach as high as 210.75°/RIU for the refractive index of the sensing medium, from 1.30 to 1.38.

scholarly journals Gravitational and Dynamical Instabilities of a Decelerating Plane-Parallel Slab of Finite Thickness

1988 ◽  
Vol 101 ◽  
pp. 509-512
Author(s):  
G. Mark Voit
Keyword(s):  
Star Formation ◽  
Interstellar Medium ◽  
Incompressible Fluid ◽  
Gravity Wave ◽  
Finite Thickness ◽  
Blast Waves ◽  
Plane Parallel ◽  
The Stability ◽  
Dynamical Instabilities ◽  
Symmetric And Antisymmetric Modes

AbstractIn order to explore how supernova blast waves might catalyze star formation, we investigate the stability of a slab of decelerating gas of finite thickness. We examine the early work in the field by Elmegreen and Lada and Elmegreen and Elmegreen and demonstrate that it is flawed. Contrary to their claims, blast waves can indeed accelerate the rate of star formation in the interstellar medium. Also, we demonstrate that in an incompressible fluid, the symmetric and antisymmetric modes in the case of zero acceleration transform continuously into Rayleigh-Taylor and gravity-wave modes as acceleration grows more important.

Reflection and transmission coefficients in plane-parallel layers with refractive-index mismatch

1992 ◽  
Vol 31 (1) ◽  
pp. 106 ◽  
Author(s):  
Leonard I. Grossweiner ◽  
James L. Karagiannes ◽  
Linda Ramball Jones ◽  
Porter W. Johnson
Keyword(s):  
Refractive Index ◽  
Reflection And Transmission Coefficients ◽  
Reflection And Transmission ◽  
Transmission Coefficients ◽  
Plane Parallel

On the Decelerating Shock Instability of a Plane‐Parallel Slab with Finite Thickness

2000 ◽  
Vol 532 (2) ◽  
pp. 1172-1180 ◽  
Author(s):  
Ryoichi Nishi ◽  
Hideyuki Kamaya
Keyword(s):  
Finite Thickness ◽  
Plane Parallel

scholarly journals On the Boundary Intensities in a Plane Parallel Slab With Linearly Varying Refractive Index

2016 ◽  
Vol 138 (7) ◽  
Author(s):  
Vital Le Dez ◽  
Hamou Sadat
Keyword(s):  
Refractive Index ◽  
Diffuse Reflection ◽  
Exact Expression ◽  
Plane Parallel ◽  
Semitransparent Medium ◽  
The One

An exact expression of the outgoing boundary intensities in the case of a gray nonscattering semitransparent medium (STM) confined in a plane parallel slab with a refractive index linearly depending on the position is proposed. It is shown that directly using the diffuse reflection law gives in a much easier way exactly the same result as the one obtained with the pseudosource method.

Parametric Study of Simultaneous Radiative Transfer in Plane-Parallel Scattering Medium With Variable Refractive Index by Spectral Collocation Method

2013 ◽  
Author(s):  
Jing Ma ◽  
Yasong Sun ◽  
Benwen Li
Keyword(s):  
Refractive Index ◽  
Radiative Transfer ◽  
Collocation Method ◽  
Spectral Collocation Method ◽  
Scattering Medium ◽  
Spectral Collocation ◽  
Plane Parallel ◽  
Derivative Term ◽  
Scattering Phase Function ◽  
Angular Domains

In this work, a spectral collocation method is developed to simulate radiative transfer in a refractive planar medium. The space and angular domains of radiative intensity are discretized by Chebyshev polynomials, and the angular derivative term and the integral term of radiative transfer equation are approximated by spectral collocation method. The spectral collocation method can provide exponential convergence and obtain high accuracy even using few nodes. There is a very satisfying correspondence between the spectral collocation results and available data in literatures. Influence of the extinction coefficient, the scattering albedo, the scattering phase function, the gradient of refractive index and the emissivity of boundary are investigated for the plane-parallel scattering medium with variable refractive index.

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