Magnetic assembly and field-tuning of ellipsoidal-nanoparticle-based colloidal photonic crystals.
Magnetic assembly and field-tuning of ellipsoidal-nanoparticle-based colloidal photonic crystals.
复制标题
DOI：
10.1002/anie.201501782
复制
发表时间：
2015-06
影响因子：
--
通讯作者：
Mingsheng Wang;Le He;Wenjing Xu;Xin Wang;Yadong Yin
中科院分区：
文献类型：
--
作者：
Mingsheng Wang;Le He;Wenjing Xu;Xin Wang;Yadong Yin
各向异性纳米结构为定制其整体的集体特性提供了额外的自由度。使用 Fe@SiO2 纳米椭球体作为各向异性构件，本文展示了一类新型磁响应光子结构，其光子特性可以通过控制它们所暴露的磁场方向来动态调整。当场方向垂直于入射角时，这些新颖的光子结构会以最小波长衍射，而当场切换到平行方向时，会以最大波长衍射；当场平行或垂直于入射光时，衍射强度达到最大值，并且当场方向偏离角度时，衍射强度降低。
Anisotropic nanostructures provide an additional degree of freedom for tailoring the collective properties of their ensembles. Using Fe@SiO2 nanoellipsoids as anisotropic building blocks, herein we demonstrate a new class of magnetically responsive photonic structures whose photonic properties can be dynamically tuned by controlling the direction of the magnetic fields they are exposed to. These novel photonic structures diffract at a minimum wavelength when the field direction is perpendicular to the incident angle, and a maximum wavelength when the field is switched to parallel direction; and the diffraction intensity reaches maximum values when the fields are either parallel or perpendicular to the incident light, and decreases when the field direction is moved off-angle.