Besides, in the SMCW structure, the thickness of the guiding layer can be enlarged to submillimeter scale and can contain ultrahigh order guided modes with mode index of over 1000.

• 另外,对称金属包覆波导的导波层厚度还可以扩展至亚毫米甚至毫米量级,并因此能够容纳模序数上千的高阶导模。