Finite-Difference Time-Domain Analysis of Optical Channel Drop Filters Based on Microcavities and Photonic Crystals
Date Issued
2004
Date
2004
Author(s)
Chen, Min-Feng
DOI
zh-TW
Abstract
In this thesis, the finite-difference time-domain (FDTD) method with the
uniaxial perfectly matched layer boundaries is employed to model several
types of channel drop filters in two dimensions. The signal switching mechanisms of different kinds of filters are expressed. Microcavity resonator based
filters including micro-ring and micro-disk for both transverse electric (TE)
and transverse magnetic (TM) modes are analyzed. Various ring-waveguide
widths are considered and the two-stage ring filter is also studied. Photonic
crystal based filters involving the monopole cavity and the doubly degenerate
hexapole cavity are then investigated. We first analyze the photonic band
gap materials using the plane wave expansion method. The electromagnetic
wave behavior in photonic crystal is also discussed, including negative refraction, waveguide bending and splitters. The essential properties for the
channel drop filters, such as resonant frequencies, linewidth, and quality factor,
are determined by the FDTD simulation. In order to obtain reliable
results of these quantities, the curved dielectric interfaces are treated by the
index average scheme. With the index average scheme, the resonant frequencies given by the the FDTD simulation are stabilized. Since the properties
of photonic devices obtained by the FDTD method with the index average
scheme are different from those with the staircase approximation, several
published photonic crystal based resonators are redesigned to achieve high
performance for the channel drop filters.
Subjects
有限差分時域法
濾波器
Finite-Difference Time-Domain
Channel Drop Filters
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-93-R91941028-1.pdf
Size
23.31 KB
Format
Adobe PDF
Checksum
(MD5):f49d7cb25910f32ed44d28408e1e6772