The Si-SiO_2 composite and Si inverse opal have three photonic band gaps lying in band2-band3, band5-band6,band8-band9. The gap width between band5-band6 is relatively narrow.

• Si-SiO2复合体与Si反Opal垂直(111)面入射时,在较高的填充率下存在三个光学带隙,分别位于band2-band3、band5-band6、band8-Band9,其中band2-band3之间的带隙较宽,band5-band6之间的带隙较窄,band8-band9之间的带隙会产生完全带隙。