Analysis of Transmission Characteristics of Metallic Gratings by Finite-Difference Frequency-Domain Method
Date Issued
2006
Date
2006
Author(s)
Huang, Hsien-Po
DOI
zh-TW
Abstract
A modified finite-difference frequency-domain method is used to analyze the one-dimensional periodic metallic gratings. The dispersion of metal and the boundary conditions at material interfaces are properly treated to circumvent the possible difficulty of divergence. In the visible light or infrared regime, the dielectric constant of a metal is described by Drude model. It is demonstrated that the effects of cavity modes and coupled modes can influence the transmittance and reflectance spectra of symmetric metallic grating structures. As a result from our simulation about the interaction of narrow-band coupled modes, an asymmetric metallic grating structure is designed as an electrode and a color filter for the white-light LED.
Subjects
金屬光柵
頻域有限差分
FDFD metallic grating
Type
thesis
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