The effect of media parameters on wave propagation in a chiral metamaterials slab using FDTD

Wang, M. Y.; Li, G. P.; Zhou, Miaofang; Wang, R.; Zhong, C. L.; Xu, Jun; Zheng, Huinan

doi:10.1002/jnm.1902

Cited by 9 publications

(10 citation statements)

References 32 publications

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“…The chiral media [1] are the special materials which can produce the polarization rotation phenomenons. Among those chiral materials, the chiral metamaterial is a new kind of metamaterials with excellent optical activity and circular dichroism, which potentially provides a simpler approach to achieve the negative refraction [2]. The study on CMMs belongs to the category of subwavelength electromagnetics.…”

Section: Introductionmentioning

confidence: 99%

FETD Study of the Wave Propagation in Chiral Metamaterials

sci¹

2021

AAMM

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In this paper, we propose a finite element time-domain (FETD) method for the Maxwell's equations in chiral metamaterials (CMMs). The time-domain model equations are constructed by the auxiliary differential equations (ADEs) method. The source excitation method entitled total-field and scattered-field (TF/SF) decomposition technique is applied to FETD method for the first time in simulating the propagation of electromagnetic wave in CMMs, based on which a unified ADE-FETD-UPML-TF/SF scheme is proposed to simulate the wave in CMMs. The following properties of CMMs can be observed successfully from the numerical experiments based on our method, i.e., the ability of the polarization rotation, and the negative phase velocity. The amplitude of reflected wave can effectively be controlled by the physical parameters of CMMs.

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Section: Introductionmentioning

confidence: 99%

FETD Study of the Wave Propagation in Chiral Metamaterials

sci¹

2021

AAMM

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“…However, the frequency dependence of the extracted ε and μ vectors does not obey any known dispersive material model description. As a result, it becomes very time consuming to simulate the homogenized structure with a finite difference time domain (FDTD) method because of the requirement of temporal convolutions of ε and μ . Fortunately, the computational performance can be improved if one approximates ε and μ via Drude and Lorentz dispersive models, respectively .…”

Section: Introductionmentioning

confidence: 99%

Improved homogenization procedure based on a Drude-Lorentz dispersive model for metamaterials

Mota

Borges

2016

Microw. Opt. Technol. Lett.

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The extraction of constitutive parameters of metamaterials, i.e., electrical permittivity (ε) and magnetic permeability (μ), is quite challenging. Usually, two techniques are used for this purpose, namely, the Nicolson‐Ross‐Weir technique and the dispersive models technique (Lorentz and Drude). However, these techniques fail to produce accurate results when the operating frequency is near the cell resonance frequency. In this article, an improved transition layer‐based homogenization procedure is proposed where the metamaterial cell is homogenized as a Drude–Lorentz multilayer slab. This assumption considerably improves the scattering parameters approach, as demonstrated for a metamaterial slab with a thickness of three Omega cells. In addition, the proposed technique is more suitable for implementation in finite difference time domain (FDTD) methods. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1490–1494, 2016

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“…Because there is no available analytical approach for objects of complicated shapes, some numerical approaches, such as the finite-difference time-domain (FDTD) method [11,24,25,26,27,28], has to be employed. For the analysis of electromagnetic waves and optical forces on effective electric or magnetic dispersive particles [12], not dielectric or metal particles, the Lorentz force formula incorporated with the FDTD method for conventional nonchiral particles has been reported [11].…”

Section: Introductionmentioning

confidence: 99%

The distribution of electromagnetic waves and forces in a dispersive chiral cylinder

Wang

et al. 2016

IEICE Electron. Express

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By introducing the effects of bound electric and magnetic charges, the mechanical interaction between waves and a chiral cylinder is investigated with the auxiliary differential equations finite-difference timedomain method. The trapping Lorentz force density distributions of an active chiral cylinder, as well as a core-shell cylinder consisting of a chiral shell and a dielectric core illuminated by a normally incident plane wave are simulated. Numerical results show that the working principle is based on gradient forces generated by the continuously coupled cross-polarized waves. This finding may provide a promising avenue in chirality detection and sorting chiral particles from achiral ones. Keywords: chiral media, electromagnetic, optics, dispersion Classification: Optical systems References[1] A. Ashkin, et al.: "Observation of a single-beam gradient force optical trap for dielectric particles," Opt. Lett. 11 (1986)

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The effect of media parameters on wave propagation in a chiral metamaterials slab using FDTD

Cited by 9 publications

References 32 publications

FETD Study of the Wave Propagation in Chiral Metamaterials

FETD Study of the Wave Propagation in Chiral Metamaterials

Improved homogenization procedure based on a Drude-Lorentz dispersive model for metamaterials

The distribution of electromagnetic waves and forces in a dispersive chiral cylinder

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