Inducing Symmetry Breaking in Nanostructures: Anisotropic Stretch-Tuning Photonic Crystals
Inducing Symmetry Breaking in Nanostructures: Anisotropic Stretch-Tuning Photonic Crystals
复制标题
DOI：
10.1103/physrevlett.105.233909
复制
发表时间：
2010-12-03
影响因子：
8.6
通讯作者：
Hellmann, G. P.
中科院分区：
文献类型：
--
作者：
Kontogeorgos, Andreas;Snoswell, David R. E.;Hellmann, G. P.
我们使用弹性诱导相变来打破自组装纳米结构的结构对称性，产生显着改变的功能特性。在不同方向上拉伸有序聚合物蛋白石，使fcc光子晶体形成相应畸变的单斜晶格。这打破了晶体平面散射的传统选择规则，当破相拉伸在特定方向时产生额外的多重散射色。当样品扭曲时，光谱实时跟踪散射，揭示了< 121 >定向变形时出现的新相变。
We use elastically induced phase transitions to break the structural symmetry of self-assembled nanostructures, producing significantly modified functional properties. Stretching ordered polymer opals in different directions transforms the fcc photonic crystal into correspondingly distorted monoclinic lattices. This breaks the conventional selection rules for scattering from the crystal planes, yielding extra multiply scattered colors when the phase-breaking stretch is in specific directions. Scattering is spectroscopically tracked in real time as the samples distort, revealing a new phase transition that appears for < 121 >-oriented deformations.