Kushnir Sergey E, Sapoletova Nina A, Roslyakov Ilya V, Napolskii Kirill S
Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia.
Department of Materials Science, Lomonosov Moscow State University, Moscow 119991, Russia.
Nanomaterials (Basel). 2022 May 3;12(9):1548. doi: 10.3390/nano12091548.
One-dimensional photonic crystals (1D PhCs) obtained by aluminium anodizing under oscillating conditions are promising materials with structure-dependent optical properties. Electrolytes based on sulphuric, oxalic, and selenic acids have been utilized for the preparation of anodic aluminium oxide (AAO) 1D PhCs with sub-100-nm pore diameter. AAO films with larger pores can be obtained by anodizing in phosphorous acid at high voltages. Here, for the first time, anodizing in phosphorous acid is applied for the preparation of AAO 1D PhCs with nonbranched macropores. The sine wave profile of anodizing voltage in the 135-165 V range produces straight pores, whose diameter is above 100 nm and alternates periodically in size. The pore diameter modulation period linearly increases with the charge density by a factor of 599 ± 15 nm·cm·C. The position of the photonic band gap is controlled precisely in the 0.63-1.96 µm range, and the effective refractive index of AAO 1D PhCs is 1.58 ± 0.05.
通过在振荡条件下进行铝阳极氧化获得的一维光子晶体（1D PhCs）是具有结构依赖光学特性的有前景的材料。基于硫酸、草酸和亚硒酸的电解质已被用于制备孔径小于100纳米的阳极氧化铝（AAO）1D PhCs。通过在高电压下于亚磷酸中进行阳极氧化可以获得具有更大孔径的AAO薄膜。在此，首次将在亚磷酸中进行阳极氧化应用于制备具有无分支大孔的AAO 1D PhCs。在135 - 165伏范围内的阳极氧化电压的正弦波轮廓产生直孔，其直径大于100纳米且尺寸周期性交替变化。孔径调制周期随电荷密度线性增加，增加系数为599 ± 15纳米·厘米·库仑。光子带隙的位置在0.63 - 1.96微米范围内被精确控制，并且AAO 1D PhCs的有效折射率为1.58 ± 0.05。
