The structure with basic cell of Al/MgF2/Al2O3/MgF2/Al can keep high transmission over the whole ultraviolet frequency and forbid the propagation of visible light.

• 研究还发现，Al/MgF2/Al2O3/MgF2/Al这种结构单元在整个近紫外波段都保持了高透射率，并且能抑制可见光波的传输。