摘要
设计了基于石榴石型铁氧体磁性材料的光子晶体滤波器和光开关。利用平面波展开(PWE)法,分析了特定半径下光子晶体的能带结构,利用时域有限差分(FDTD)法分析了磁场改变时磁性材料耦合频率的变化。结果表明,该器件在不加磁场时具有优良的选频滤波功能,各目标光信号的透射率均达90%以上,且信道串扰小;加磁场后,耦合腔的耦合频率改变,器件处于关断状态。该器件的关断最大稳定时间达26.7ps,最大透射率仅为8%,关断效果明显,具有良好的开关特性。
The photonic crystal filter and optical switch are designed based on the garnet-type ferrite magnetic material.The band structure of the photonic crystal with a specific radius is analyzed by the plane wave expansion method（PWM）,and the change of coupling frequency of magnetic materials with the magnetic field is analyzed by the finite-difference time-domain（FDTD）method.The results show that,when the magnetic field is not added,this device has excellent frequency selection and filtering functions,the transmissivity of each target light signal is above 90% and the channel crosstalk is small.After the addition of the magnetic field,the coupling frequency of the coupling cavity changes and the device is in a closed state.The maximum stable closing time of this device is 26.4 ps and the maximum transmissivity is only 8%,which indicates that the cut-off effect is obvious and it possesses a good switching characteristic.
作者
梁龙学
张晓金
吴小所
张云霞
赵丹
Liang Longxue;Zhang Xiaojin;Wu Xiaosuo;Zhang Yunxia;Zhao Dan(School of Electronic and Information Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, Chin)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2018年第5期130-135,共6页
Acta Optica Sinica
基金
国家自然科学基金(61366006)
