Opal-based photonic crystal with double photonic bandgap structure
Opal-based photonic crystal with double photonic bandgap structure
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DOI：
10.1088/0953-8984/12/37/318
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发表时间：
2000-09
期刊：
影响因子：
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通讯作者：
S. Romanov;H. M. Yates;M. Pemble;Richard M. De La Rue
中科院分区：
文献类型：
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作者：
S. Romanov;H. M. Yates;M. Pemble;Richard M. De La Rue
人造蛋白石的一部分的内表面被覆盖了间隙，使蛋白石晶体的其余部分保持空白，从而形成了光子异质结构。在光学透射谱和反射谱中观察到两个Bragg共振。这两个共振被发现随着入射光的偏振和光相对于蛋白石(111)面传播角度的变化而表现不同。观察到光的去偏振在阻带内的频率处发生得最有效，这显然是由于传播的电磁波穿过分隔双光子晶体两部分的界面时重新耦合到不同的本征模式系统。
The interior surfaces of one part of a piece of artificial opal have been coated with GaP so that the remaining part of the opal crystal remains empty, thus forming a photonic heterostructure. Two Bragg resonances have been observed in the optical transmission and reflectance spectra. These two resonances were found to behave differently with changes in the polarization of the incident light and the angle of propagation of the light with respect to the (111) planes of opal. Depolarization of the light was observed to occur most effectively at frequencies within the stop-bands, apparently due to the re-coupling of the propagating electromagnetic wave to a different system of eigenmodes when it crosses the interface separating two parts of the double photonic crystal.