周期单层立方体多孔结构及其元胞的吸收特性

Absorption characteristics of periodic cubic single layer structure and element cell

中文关键词: 微尺度辐射  空间微结构  吸收特性  时域有限差分法

英文关键词: microscale radiation  spatial micro-structure  absorptivity property  finite difference time domain

中文摘要:

      多孔结构的辐射特性与结构的特征尺寸有直接联系。当结构的特征尺寸与辐射波波长相当的时候，物体之间的辐射将产生新的效应，如表面等离子激元、微腔谐振效应等。本文采用时域有限差分法（FDTD），研究了周期性立方体多孔结构及其元胞的吸收特性。结果表明，由于表面等离子激元，元胞结构在428nm时的吸收能力最强，周期性单层立方体多孔结构在350~600nm波段可以起到强化吸收的作用，但其吸收能力并不是元胞吸收能力的线性相加。

英文摘要:

      The radiation characteristics of the porous structure are directly related to the characteristic size of the structure. When the characteristic size of the structure is equivalent to the wavelength of the radiation wave, the radiation between the objects will produce new effects, such as surface plasmon polaritons, micro-cavity resonance effect and so on. The current work investigated the absorptivity of periodic cubic single layer structure by using Finite Difference Time Domain. The absorptivity property of element cell was also discussed. The results show that, because the surface plasmon polaritons , the absorptivity ability is enhanced in wavelength of 350~600 nm for periodic cubic single layer structure, the absorptivity is strongest at wavelength of 428 nm for element cell.