摘要
We design a channel-drop filter(CDF)with a linear gradient microcavity in a two-dimensional(2D)photonic crystal(PC).The model of three-port CDF with reflector is used to achieve high quality factor(Q-factor)and 100%channel-drop efficiency.The research indicates that adjusting the distance between reference plane and reflector can simultaneously influence the Q-factor due to coupling to a bus waveguide and the phase retardation occurring in the round trip between a microcavity and a reflector.The calculation results of 2D finite-difference time-domain(FDTD)method show that the designed filter can achieve the drop efficiency of 96.7%and ultra-high Q-factor with an ultra-small modal volume.
We design a channel-drop filter （CDF） with a linear gradient microcavity in a two-dimensional （2D） photonic crystal （PC） The model of three-port CDF with reflector is used to achieve high quality factor （Q-factor） and 100% channel-drop efficiency. The research indicates that adjusting the distance between reference plane and reflector Can simultaneously influence the Q-factor due to coupling to a bus waveguide and the phase retardation occurring in the round trip between a microcavity and a reflector. The calculation results of 2D finite-difference time-domain （FDTD） method show that the designed filter can achieve the drop efficiency of 96.7% and ultra-high Q-factor with an ultra-small modal volume.
基金
supported by the Natural Science Foundation of the Higher Education Institutions of Guangxi Province in China(No.201202ZD010)
关键词
线性梯度
光子晶体
滤波器
高品质因数
微通道
有限差分时域
效率下降
Q因子
Drops
Finite difference time domain method
Microcavities
Photonic crystals
Power inductors
Q factor measurement
Reflection
