Acta Photonica Sinica, Volume. 43, Issue 10, 1023001(2014)
The Maximum Photonic Bandgap Extension of Omni-directional Reflectors Based on Cascaded One-dimensional Photonic Crystal
The omni-directional transmission (reflection) properties were theoretically investigated for photonic heterostructures composed of cascaded one-dimensional photonic crystals. Each photonic crystal in the structure has the same materials and different optical thickness ratios of the alternate high-and low-refractive index layers. Taking two photonic crystals cascaded structure as the object of study, the change of photonic bandgap with different polarization and incident angle was investigated through transfer matrix method, the condition of designing omnidirectional reflectors with the maximum photonic bandgap width was obtained, i.e., the upper bandgap edge of the former photonic crystal overlaps with the lower bandgap edge of the latter photonic crystal at the maximum incident angle. The parameters of the omnidirectional photonic bandgap were given for the cascaded structure with the condition satisfied and not satisfied. The widths of the omnidirectional photonic bandgap were compared. The results show that the cascaded structure with the condition satisfied has the maximum omnidirectional photonic bandgap width.
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ZHANG Juan. The Maximum Photonic Bandgap Extension of Omni-directional Reflectors Based on Cascaded One-dimensional Photonic Crystal[J]. Acta Photonica Sinica, 2014, 43(10): 1023001
Received: Jan. 17, 2014
Accepted: --
Published Online: Nov. 6, 2014
The Author Email: Juan ZHANG (juanzhang@staff.shu.edu.cn)