By adjusting the difference of refractive index of the double layer film, single mode operation can be realized with a certain waveguide thickness.
通过改变外延生长工艺来调节两层薄膜的折射率，可在一定波导的厚度范围内实现单模传输。
By adjusting the difference of refractive index of the double layer film, single mode operation can be realized with a certain waveguide thickness.
通过改变外延生长工艺来调节两层薄膜的折射率，可在一定波导的厚度范围内实现单模传输。
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