Analysis of scattering from cylindrical structures coated by radially inhomogeneous layer using Taylor’s series method

Kiani, Mohammad; Abdolali, Ali; Salary, Mohammad Mahdi

doi:10.1080/09205071.2014.938172

Cited by 9 publications

(4 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Owing to its superior efficiency compared to brute-force computational methods, the T-matrix model facilitates the performance characterization of large-scale electro-optical devices wherein the optically thin active regions can have an inhomogeneous permittivity profile. For modeling the radially inhomogeneous permittivity profiles, we adopt a finely stratified approach 61 which has been shown to have an excellent agreement with the exact inhomogeneous profile 62 . Such a modeling approach which involves passing a parameter from one discipline to another is referred to as a hierarchical multiscale modeling 63 .…”

Section: Methodsmentioning

confidence: 99%

Electrically Tunable Metamaterials Based on Multimaterial Nanowires Incorporating Transparent Conductive Oxides

Salary

Mosallaei

2017

Sci Rep

View full text Add to dashboard Cite

We present novel design approaches for metasurfaces and metamaterials with electrical tunability offering real-time manipulation of light and serving as multifunctional devices in near-infrared frequency regime (at the specific wavelength of 1.55 μm). For this purpose, we integrate indium-tin-oxide (ITO) as a tunable electro-optical material into multimaterial nanowires with metal-oxide-semiconductor and metal-insulator-metal configurations. In particular, an active metasurface operating in the transmission mode is designed which allows for modulation of the transmitted light phase over 280 degrees. This large phase modulation is afforded in the cost of low transmission efficiency. We demonstrate the use of such active metasurfaces for tunable bending and focusing in free-space. Moreover, we investigate the implementation of this material in deeply subwavelength multimaterial nanowires, which can yield strong variations in the effective refractive index by the virtue of internal homogenization enabling tunability of the performance in gradient refractive index metamaterials. In the theoretical modeling of these structures, we adopt a hierarchical multiscale approach by linking drift-diffusion transport model with the electromagnetic model which rigorously characterizes the electro-optical effects.

show abstract

Section: Methodsmentioning

confidence: 99%

Electrically Tunable Metamaterials Based on Multimaterial Nanowires Incorporating Transparent Conductive Oxides

Salary

Mosallaei

2017

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The differential equation system in ( 20)-( 23) has no exact solution except for some special cases. Similar to previous studies in the field of planar and cylindrical structures [28][29][30][31][32], the process of derivation of EM fields variation in the direction of inhomogeneity are based on the solution of the wave propagation system of differential equations. Therefore, the difference between equations form and the process of extracting them in comparison with the recent studies in the field of radially inhomogeneous spherical structures is obvious and expected [18][19][20][21][22].…”

Section: Problem Definitionmentioning

confidence: 99%

“…Meanwhile, inhomogeneous media are of the great importance owing to their extensive use in lens antenna design [23][24][25][26] and transparency [5,27]. In addition, according to the presented applications of inhomogeneous planar and cylindrical structures in [28][29][30][31][32], using these media in spherical structures could also result in potentially interesting applications. Along with the abovementioned investigations, several recent researches in the field of inhomogeneous spherical structures show the significance of analyzing EM scattering from these structures [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Analytical method for analysis of electromagnetic scattering from inhomogeneous spherical structures using duality principles

2018

Self Cite

View full text Add to dashboard Cite

In this article, an analytical approach is presented for the analysis of electromagnetic (EM) scattering from radially inhomogeneous spherical structures (RISSs) based on the duality principle. According to the spherical symmetry, similar angular dependencies in all the regions are considered using spherical harmonics. To extract the radial dependency, the system of differential equations of wave propagation toward the inhomogeneity direction is equated with the dual planar ones. A general duality between electromagnetic fields and parameters and scattering parameters of the two structures is introduced. The validity of the proposed approach is verified through a comprehensive example. The presented approach substitutes a complicated problem in spherical coordinate to an easy, well posed, and previously solved problem in planar geometry. This approach is valid for all continuously varying inhomogeneity profiles. One of the major advantages of the proposed method is the capability of studying two general and applicable types of RISSs. As an interesting application, a class of lens antenna based on the physical concept of the gradient refractive index material is introduced. The approach is used to analyze the EM scattering from the structure and validate strong performance of the lens.

show abstract

“…For more general permittivity profiles, a finely stratified cylinder model, in which the radially inhomogeneous layer is assumed to be composed of concentric homogeneous layers, is applied in [7]. A meshless alternative based on Taylor's series expansion of the permittivity function is also proposed for such general profiles [8]. For the case that the permittivity changes not only along the radial direction but also along the azimuthal direction, an extension of the Rigorous Coupled Wave Analysis is applied to solve the scattering problem [9].…”

Section: Introductionmentioning

confidence: 99%

A Meshless Method for Tm Scattering From Arbitrary Shaped Radially Inhomogeneous Cylinders

Aslanyürek¹,

Gürbüz²

2021

PIER M

View full text Add to dashboard Cite

A meshless method for fast solution of the electromagnetic scattering problem related to arbitrary shaped radially inhomogeneous cylinders is proposed. This is an important problem since radially inhomogeneous circular cylinders are common in various engineering applications, and deformations such as notches, grooves, and noncircular holes on such cylinders are required for different purposes. This approach is basically an extension of the previously proposed method, which is based on Fourier series representation of the electric field on boundaries. In the original method, a multilayer cylinder with arbitrary shaped homogeneous layers is considered, and accordingly, the general solution of the cylindrical wave equation in homogeneous medium is used. Here we modify the method by considering the general solution in radially inhomogeneous medium and derive compact expressions for the field.

show abstract

Analysis of scattering from cylindrical structures coated by radially inhomogeneous layer using Taylor’s series method

Cited by 9 publications

References 34 publications

Electrically Tunable Metamaterials Based on Multimaterial Nanowires Incorporating Transparent Conductive Oxides

Electrically Tunable Metamaterials Based on Multimaterial Nanowires Incorporating Transparent Conductive Oxides

Analytical method for analysis of electromagnetic scattering from inhomogeneous spherical structures using duality principles

A Meshless Method for Tm Scattering From Arbitrary Shaped Radially Inhomogeneous Cylinders

Contact Info

Product

Resources

About