Generalizing Dipolar Model for the Characterization of Substrated Periodic Metasurfaces Under Oblique Illumination

Hesari-Shermeh, Maryam; Arand, Bijan Abbasi; Yazdi, Mohammad

doi:10.1109/tap.2022.3212118

Cited by 3 publications

(4 citation statements)

References 34 publications

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“…In fact, the array can be considered as a conventional array of supercells with a new period, a' , where this new period is the center-to-center distance between any two adjacent supercells. As it was mentioned in 18 , 21 , for any arbitrary nanoparticle in a defined frequency range, as long as the higher-order multipoles are not excited or can be negligible, h/a' < 0.75 and ka ' < 3, the results of the proposed method are accurate, where h and k are the distance between the primary dipole and its image, and wave number, respectively. In fact, considering the conditions mentioned for this method in the current paper, this method no longer has a limit on frequency.…”

Section: Theorymentioning

confidence: 75%

“…The reflection and transmission coefficients of the substrated inhomogeneous metasurface have also been calculated using Eq. ( 3 ) mentioned in 18 , for a normal illumination. Figure 8 shows the results of our proposed approach, which have been compared to those obtained from a full-wave Ansys Inc. HFSS simulator, with the results showing good accordance.…”

Section: Resultsmentioning

confidence: 97%

“…In fact, considering the conditions mentioned for this method in the current paper, this method no longer has a limit on frequency. Finally, by calculating the total effective polarizabilities of the inhomogeneous metasurface, one can obtain the reflection and transmission coefficients using the equation mentioned in 18 , for normal illuminations.…”

Section: Theorymentioning

confidence: 99%

“…In contrast, a semi-analytical method has been presented for metasurface analysis based on an independent study of the electromagnetic behaviors of the constituting nanoparticles, and the interactions between them. Several references were using this approach for analyzing metasurfaces 18 , 20 – 24 . In 23 , this approach is used for analyzing inhomogeneous metasurfaces in free spaces; while in 21 , this method is extended to the case of periodic metasurfaces located on dielectric substrates, with normal incident plane waves.…”

Section: Introductionmentioning

confidence: 99%

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Substrated inhomogeneous metasurfaces analysis using interaction constant method

Hesari-Shermeh

Abbasi-Arand

2023

Sci Rep

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Inhomogeneous metasurfaces as a periodic array of supercells in which each supercell consists of different types of particles are good candidates for increasing the bandwidth in many applications. However, the presence of a substrate is often apparent in many cases; therefore, analyzing substrated inhomogeneous metasurfaces is highly attractive and important. In this paper, an efficient analysis of the plane-wave scattering by inhomogeneous substrated metasurfaces is presented using interaction constant method (ICM). In our proposed method, we calculate the total effective polarizability tensors of inhomogeneous substrated metasurfaces using both the individual polarizabilities of each particle and the closed-form interaction coefficients that relate to the interactions of the particles with each other. Since the interaction constants are calculated analytically, this method is time effective for different arrangements of particles in supercells, and with different array periods. The reflectance and transmittance of different inhomogeneous metasurfaces have been obtained and compared to full-wave simulations by a commercial EM solver, here, and this has confirmed the accuracy of the numerical results of our proposed method. Moreover, in our last example, we present a wideband terahertz absorber, and analyze its structure with our method. It seems that our proposed method is a step forward in the analysis and design of inhomogeneous substrated metasurfaces, for various applications.

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Section: Theorymentioning

confidence: 75%

Section: Resultsmentioning

confidence: 97%

Section: Theorymentioning

confidence: 99%