Wang Zheng, Fan Shanhui
Ginzton Laboratory, Stanford University, Stanford, California 94305-4090, USA.
Opt Lett. 2005 Aug 1;30(15):1989-91. doi: 10.1364/ol.30.001989.
We propose an optical circulator formed of a magneto-optical cavity in a 2D photonic crystal. With spatially engineered magnetic domain structures, the cavity can be designed to support a pair of counterrotating states at different frequencies. By coupling the cavity to three waveguides, and by proper matching of the frequency split of the cavity modes with the coupling strength between the cavity and the waveguide, ideal three-port circulators with complete isolation and transmission can be created. We present a guideline for domain design needed to maximize the modal coupling and the operational bandwidth for any given magneto-optical constant.
我们提出了一种由二维光子晶体中的磁光腔构成的光环行器。通过空间工程化的磁畴结构，该腔可以被设计成在不同频率下支持一对反向旋转的状态。通过将该腔与三个波导耦合，并通过使腔模的频率分裂与腔和波导之间的耦合强度适当匹配，可以创建具有完全隔离和传输功能的理想三端口光环行器。对于任何给定的磁光常数，我们给出了使模态耦合和工作带宽最大化所需的磁畴设计准则。
