Nested Hexagonal Photonic Crystals in Purple Pearl

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• 作者：Fen FUQingyang YUELiangguang TIANXiangang XUXiaobo HU
• 会议时间：2015-11-30
• 关键词：pearl ; photonic crystal ; nested hexagonal structure ; iridescence color
• 作者单位：Fen FU,Xiangang XU,Xiaobo HU(Shandong University, Jinan 250100, China)Qingyang YUE(The Second Research Institute of China Electronics Technology Group Corporation, Taiyuan 030000, China)Liangguang TIAN(Shandong Institute of Supervision & Inspection on Product Quality, Jinan 250100, China)
• 母体文献：2015中国珠宝首饰学术交流会论文集
• 会议名称：2015中国珠宝首饰学术交流会
• 会议地点：北京
• 主办单位：中国珠宝玉石首饰行业协会
• 语种：chi

摘要

We have investigated the relationship between the structural color and the periodic structure in purple pearl, a material that exhibits angle-dependent yellowish-green iridescence.Surprisingly, a hierarchical hexagonal photonic crystal stracture was discovered on the pearl surface through HRSEM observation.A finite-difference time-domain calculation was performed on this structure, and also on a multilayer structure that exists beneath the surface layer.The calculations show that the nested hexagonal photonic crystal structure is actually the origin of the yellowish-green iridescence of the pearl.