Using Plasmonic Cloaking Method on Infinite Cylindrical Structures and its Applications

2021 ◽  
Author(s):  
Afsaneh Rezaei ◽  
Farzad Mohajeri ◽  
Zahra Hamzavi Zarghani
Keyword(s):  
Cross Section ◽  
Magnetic Permeability ◽  
Single Layer ◽  
Scattering Cross Section ◽  
Electric Permittivity ◽  
Cylindrical Structures ◽  
Scattering Cross ◽  
Fundamental Equations

Abstract In recent years, cloaking using materials with negative electric permittivity or magnetic permeability has been studied and researched. It has been demonstrated that covering an object with a cloak that has negative electric permittivity or magnetic permeability or less than one can cause a reduction of the scattering cross section (SCS) of the object. In this paper, we have solved the problem of scattering for the object and single-layer or multi-layer cylindrical cloaks and by doing so, we have obtained the necessary fundamental equations for designing these types of cloaks in two conditions, with and without considering the effects of coupling on the mathematics of solving the problem of scattering. Using the obtained equations we have demonstrated that by using this technique reducing the level of visibility of the object is possible.

Mass Determination by Direct Measurement of Electron Scattering

1975 ◽  
Vol 33 ◽  
pp. 240-241
Author(s):  
M. K. Lamvik ◽  
A. V. Crewe
Keyword(s):  
Cross Section ◽  
Electron Scattering ◽  
Mass Density ◽  
Variable Mass ◽  
Scattering Cross Section ◽  
Mass Determination ◽  
Number Density ◽  
Cross Sectional ◽  
Thin Slice ◽  
Scattering Cross

If a molecule or atom of material has molecular weight A, the number density of such units is given by n=Nρ/A, where N is Avogadro's number and ρ is the mass density of the material. The amount of scattering from each unit can be written by assigning an imaginary cross-sectional area σ to each unit. If the current I0 is incident on a thin slice of material of thickness z and the current I remains unscattered, then the scattering cross-section σ is defined by I=IOnσz. For a specimen that is not thin, the definition must be applied to each imaginary thin slice and the result I/I0 =exp(-nσz) is obtained by integrating over the whole thickness. It is useful to separate the variable mass-thickness w=ρz from the other factors to yield I/I0 =exp(-sw), where s=Nσ/A is the scattering cross-section per unit mass.

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