Superabsorption-a method to improve absorbing boundary conditions (electromagnetic waves)

Mei, K.K.; Fang, Jiayuan

doi:10.1109/8.166524

Cited by 190 publications

(68 citation statements)

References 10 publications

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“…As it is shown in Fig. 1, two boundaries of the FDTD model are equipped with magnetic and electric boundary conditions, while the remaining sides are terminated with absorbing boundary conditions (Mei and Fana 1992). Consequently, computational effort is substantially reduced.…”

Section: Electromagnetic Model Of Birefringent Fiber With a Lamellar mentioning

confidence: 99%

Numerical analysis of a highly birefringent microstructured optical fiber with an anisotropic core

et al. 2014

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In this paper, modeling and optimization of a highly birefringent microstructured optical fiber with an anisotropic structure of a lamellar core is analyzed. The core consists of a linear stack of a high refractive index lead oxide glass F2 and a low refractive index borosilicate glass NC21A, which contributes to the anisotropy of two orthogonal polarizations of the fundamental mode propagating in the fiber. It is shown, that an appropriate choice of thickness and width of the layers constituting the core structure, enables reducing the dispersion of birefringence of the considered modes, in a wide spectral range. It is further investigated how a sub-wavelength defect, in form of a low refractive index glass introduced in the middle of the core, influences fiber's birefringence. We show for the first time, that nanodefect introduced into a lamellar core structure further reduces dispersion of birefringence in the fiber over one octave range. An average birefringence of 1.95 × 10 −3 with variation below 5 % is achieved in 800-2,000 nm bandwidth.

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Section: Electromagnetic Model Of Birefringent Fiber With a Lamellar mentioning

confidence: 99%

Numerical analysis of a highly birefringent microstructured optical fiber with an anisotropic core

et al. 2014

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“…In the analysis of this paper, we used the finite difference time domain iteration combined with Mei's superabsorption [Mei and Fang, 1992] Figures 2a and 3a. Figures 2b-2d and Figures 3b-3d illustrate the radiation patterns of the DLCX calculated from the dominant field components while S changes within the region of (0, P/2).…”

Section: Calculation and Resultsmentioning

confidence: 99%

Design and calculation of the directional leaky coaxial cables

Wang¹,

Mei²

2001

Radio Science

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Abstract. Directional leaky coaxial cables (DLCX) with periodic slots are proposed. The difference between this kind of leaky cable and the conventional LCX is that there are two rows of slots located oppositely on the outer shield of the coaxial cable. Different radiation patterns in the r-• plane can be obtained by adjusting the relative distance between the two arrays. The radiation patterns and coupling loss are calculated by finite difference time domain method and dyadic Green's function.

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“…There are several methods widely used for this purpose [15]. In this work, we have used Mur's ABCs improved by the superabsorption method [16]. The first order Mur's ABCs are given for the electric field.…”

Section: Fdtd Methodsmentioning

confidence: 99%

FDTD-based Transcranial Magnetic Stimulation model applied to specific neurodegenerative disorders

Fanjul-Vélez

Salas-García

Ortega-Quijano

et al. 2015

Computer Methods and Programs in Biomedicine

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Non-invasive treatment of neurodegenerative diseases is particularly challenging in Western countries, where the population age is increasing. In this work, magnetic propagation in human head is modeled by Finite-Difference Time-Domain (FDTD) method, taking into account specific characteristics of Transcranial Magnetic Stimulation (TMS) in neurodegenerative diseases. It uses a realistic high-resolution three-dimensional human head mesh. The numerical method is applied to the analysis of magnetic radiation distribution in the brain using two realistic magnetic source models: a circular coil and a figure-8 coil commonly employed in TMS. The complete model was applied to the study of magnetic stimulation in Alzheimer and Parkinson Diseases (AD, PD). The results show the electrical field distribution when magnetic stimulation is supplied to those brain areas of specific interest for each particular disease.Thereby the current approach entails a high potential for the establishment of the current underdeveloped TMS dosimetry in its emerging application to AD and PD.

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Superabsorption-a method to improve absorbing boundary conditions (electromagnetic waves)

Cited by 190 publications

References 10 publications

Numerical analysis of a highly birefringent microstructured optical fiber with an anisotropic core

Numerical analysis of a highly birefringent microstructured optical fiber with an anisotropic core

Design and calculation of the directional leaky coaxial cables

FDTD-based Transcranial Magnetic Stimulation model applied to specific neurodegenerative disorders

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