摘要
设计了一种亚波长圆环形三通道金属-介质-金属(MIM)波导分解复用器。利用时域有限差分(FDTD)法,在可见光到近红外频段研究了该结构的电磁传输特性,发现满足谐振条件的电磁波可以在圆环中发生多级谐振现象。通过优化出口通道在圆环上的位置,成功实现了圆环二、三、四级谐振模式的分离功能。此外,圆环的谐振波长可以通过设置圆环的半径进行调制。该微结构对光波具有束缚与传输功能,解决了光信号谐振模式分离传输问题,在光集成与通信等方面有较好的应用前景。
A subwavelength ring-shaped three channels metal-insulator-metal waveguide demultiplexer is proposed.The transmission characteristics are investigated using finite-difference time-domain method from visible to near infrared spectrum. The multi order resonance phenomenon is found in the ring when the electromagnetic waves satisfy the resonance condition. The second, third, fourth order resonance waves can be separated by optimizing output ports next to the ring. Moreover, the resonance wavelengths of the ring can be controlled by setting the radius of the ring.The structure has light trapping and transmission functions, which can solve the modes separation transmission of signal. This design structure may be useful in optical integration and communication.
出处
《激光与光电子学进展》
CSCD
北大核心
2016年第4期201-205,共5页
Laser & Optoelectronics Progress
基金
广西高校科研项目(KY2015LX123)
桂林理工大学引进人才科研启动项目(002401003422)
关键词
光学器件
亚波长结构
金属-介质-金属波导
分解复用器
谐振模
时域有限差分法
optical devices
subwavelength structure
metal-insulator-metal waveguide
demultiplexer
resonance mode
finite-difference time-domain method
