FDTD simulation and analysis of the focusing effect in 2D photonic crystals
Date Issued
2007
Date
2007
Author(s)
Weng, You-Ling
DOI
zh-TW
Abstract
We investigate the focusing effect in 2D hexagonal photonic crystal (PhC) slab with an effective negative refraction. The effective negative refraction of PhC does not guarantee the existence of left-handed meta-material, so amplification of the evanescent modes is not observed. In this thesis, 2D PhC equi-frequency contour is used to calculate the effective refraction index. We present the point source image properties in 2D PhC slab with uniform effective negative refraction index for various angles by employing the finite-difference time-domain (FDTD) technique. It is shown that the diffraction limit is not overcome by the PhC lens and large angle incident waves are mostly total reflected. The focusing properties of the photonic crystal slab are mainly due to the negative refraction effect, rather than the self-collimation effect.
Subjects
光子晶體
負折射
聚光
photonic crystals
negative refraction
focusing
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-96-R94941086-1.pdf
Size
23.31 KB
Format
Adobe PDF
Checksum
(MD5):7f45332e9a6aab4aa87c242119a3f01f