A novel compact photonic crystal ring resonator is designed based on phase-change material (PCM) to realize reconfigurable directional-coupler switching for the two wavelengths of coarse wavelength division multiplexing (CWDM) system at 1530 nm and 1550 nm. The working mechanism of this PCM-based device is analyzed from the perspective of the coupled optical field in the inner and outer resonator rings during the phase transition of selected photonic crystal rods. This kind of PCM-based directional-coupler switches will play a strong role in the reconfigurable lattice mesh-based integrated intelligent photonic system.

中文翻译：

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用于可重构方向耦合器切换的相变光子晶体环形谐振器

基于相变材料（PCM）设计了一种新颖的紧凑型光子晶体环形谐振器，以实现针对粗波分复用（CWDM）系统在1530 nm和1550 nm的两个波长的可重构定向耦合器切换。从选定的光子晶体棒的相变过程中，从内部和外部谐振器环中的耦合光场角度分析了这种基于PCM的设备的工作机理。这种基于PCM的定向耦合器开关将在基于可重构晶格网格的集成智能光子系统中扮演重要角色。