Photonic band structure of 3D ordered silica matrices
Photonic band structure of 3D ordered silica matrices
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3D 有序二氧化硅基体的光子能带结构
DOI：
10.1006/spmi.1996.0318
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发表时间：
1997
影响因子：
3.1
通讯作者：
A. Prokofiev
中科院分区：
文献类型：
--
作者：
V. Astratov;Y. Vlasov;O. Z. Karimov;A. A. Kaplyanskii;Y. Musikhin;N. Bert;V. Bogomolov;A. Prokofiev
摘要通过透射电子显微镜分析，确定了三维有序多孔二氧化硅基质（合成蛋白石）光子晶格的对称性和取向。通过光学透射测量，光子带边缘被映射出布里渊区的点L和K。结果表明，调制蛋白石孔隙的折射率，通过填充液体的结果在禁带内的光衰减长度的变化。为了增加晶格的折射率对比度，蛋白石的孔隙填充有CdS。蛋白石/CdS的衰减长度的显着减少。估计了具有“赝隙”的光子晶格的参数，即具有显著的光子态密度耗尽。
Abstract The symmetry and orientation of a photonic lattice of 3D ordered porous silica matrices (synthetic opals) are determined by analysis of transmission electron micrographs. By optical transmission measurements the photonic band edges are mapped out at points L and K of the Brillouin zone. It is shown that modulating the refractive index of opal pores by filling them with liquids results in variation of the light attenuation length within the forbidden gap. To increase the refractive index contrast of the lattice, the pores of opals were filled with CdS. A dramatic decrease in attenuation length is observed for opal/CdS. The parameters of a photonic lattice with a ‘pseudo-gap’, that is, with a prominent depletion of the photonic density of states, are estimated.