Kurs André, Joannopoulos John D, Soljačić Marin, Johnson Steven G
Department of Physics, Massachusetts Institute of Technology, Massachusetts 02139, USA.
Opt Express. 2011 Jul 4;19(14):13714-21. doi: 10.1364/OE.19.013714.
We present numerical experiments showing how coupled-mode theory can be systematically applied to join very dissimilar photonic crystal waveguides with 100% transmission. Our approach relies on appropriately tuning the coupling of the evanescent tail of a cavity mode to each waveguide. The transition region between the waveguides may be as short as a few lattice spacings. Moreover, this technique only requires varying a small number of parameters (two for each waveguide in our example) and the tuning to each waveguide may be done separately, greatly simplifying the computations involved.
我们展示了数值实验，表明耦合模理论可如何系统地应用于以100%的传输率连接非常不同的光子晶体波导。我们的方法依赖于适当地调整腔模的倏逝尾与每个波导的耦合。波导之间的过渡区域可能短至几个晶格间距。此外，该技术只需要改变少量参数（在我们的示例中每个波导两个），并且对每个波导的调整可以单独进行，极大地简化了所涉及的计算。
