透射区 meaning in Chinese

region of transmission

I also carried some research on the bragg grating composed by alternate left - handed material and right - handed material . in the reflective spectrum of the bragg grating , there exists bragg top zone ( with reflectance almost 100 % ) . however , i found that there exists some narrow transmission bands located in the bragg zone under some conditions
另外，这篇论文里还要讲到正负交替的材料组成的布拉格光栅也有很反常的现象，在光栅的反射谱上，我们不仅可以观察到和传统布拉格光栅相类似的布拉格平顶区，我们还可以看到在一定条件下，布拉格平顶区中会有一个很窄的反常透射区，也就是说只有很窄区域的波长可以透过光栅，而且中心波长是100 %透过。