Improving accuracy by subpixel smoothing in the finite-difference time domain
نویسندگان
چکیده
منابع مشابه
Improving accuracy by subpixel smoothing in the finite-difference time domain.
Finite-difference time-domain (FDTD) methods suffer from reduced accuracy when modeling discontinuous dielectric materials, due to the inhererent discretization (pixelization). We show that accuracy can be significantly improved by using a subpixel smoothing of the dielectric function, but only if the smoothing scheme is properly designed. We develop such a scheme based on a simple criterion ta...
متن کاملAccurate finite-difference time-domain simulation of anisotropic media by subpixel smoothing.
Finite-difference time-domain methods suffer from reduced accuracy when discretizing discontinuous materials. We previously showed that accuracy can be significantly improved by using subpixel smoothing of the isotropic dielectric function, but only if the smoothing scheme is properly designed. Using recent developments in perturbation theory that were applied to spectral methods, we extend thi...
متن کاملSubpixel smoothing for conductive and dispersive media in the finite-difference time-domain method.
Staircasing of media properties is one of the intrinsic problems of the finite-difference time-domain method, which reduces its accuracy. There are different approaches for solving this problem, and the most successful of them are based on correct approximation of inverse permittivity tensor epsilon(-1) at the material interface. We report an application of this tensor method for conductive and...
متن کاملمحاسبه ساختار باند بلورهای فوتونی دو بعدی با استفاده از روش finite difference time domain (fdtd(
چکیده ندارد.
15 صفحه اولComprehensive Numerical Analysis of Finite Difference Time Domain Methods for Improving Optical Waveguide Sensor Accuracy
This paper discusses numerical analysis methods for different geometrical features that have limited interval values for typically used sensor wavelengths. Compared with existing Finite Difference Time Domain (FDTD) methods, the alternating direction implicit (ADI)-FDTD method reduces the number of sub-steps by a factor of two to three, which represents a 33% time savings in each single run. Th...
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ژورنال
عنوان ژورنال: Optics Letters
سال: 2006
ISSN: 0146-9592,1539-4794
DOI: 10.1364/ol.31.002972