微盘腔垂直耦合器特性的拓展分析

利用垂直于微盘腔边界的波导与腔耦合是一种新开发的耦合技术. 采用有限元数值模拟方法对垂直耦合器的腔尺寸适应性、波长适应性和端口扩展性做出详细分析. 结果证实: 垂直耦合器在大尺寸腔中或者多个波段均有效; 并且多个垂直耦合器可以和同一盘腔交换能量, 实现滤波、分束、光路交叉的功能. 垂直耦合器在以微腔为元件的集成光路中的应用将使材料选取和光路排布更为灵活.关键词：微纳光学微腔回音壁模式垂直耦合器

Analysis of features of the microdisk cavity perpendicular coupler

The use of a waveguide perpendicular to boundaries of the microdisk cavity is a newly developed coupling technique. We make a detailed analysis about the adaptation of the cavity size, the adaptation of the wavelength and the expansibility of the ports. The results confirm that the perpendicular coupler is valid in large cavity or multiple bands. It is shown that multiple perpendicular couplers can exchange energy with a microdisk cavity and work as filter, beam splitter, and crossroads of optical path. The usage of perpendicular coupler in integrated optical circuit with microcavity components will make the selection of materials and arrangement of the optical path more flexible.