短程有序结构中光的吸收特性研究

Study on Light Absorption in Disordered Media With Short-range Order

本文研究了短程有序程度对二维新型超齐构模型(SHU)和传统的硬盘堆积模型(HD)吸收能力的调控作用。首先,在不同的纳米孔数目条件下,两种结构对尺寸效应的敏感程度不同。孔数目的变化对HD结构的吸收特性的影响较小,SHU结构的吸收能力随着纳米孔数目的增多不断增强最终趋于稳定。短程有序程度的增加会增强特定波段的布拉格散射强度,使得吸收图谱出现逐渐增强的吸收峰,吸收能力进一步提高.与HD结构相比,SHU结构的吸收图谱对短程有序程度的变化更加敏感,且整体吸收能力优于HD结构.本文对于研究光在无序介质中的吸收和散射特性具有重要的理论和应用价值。

We investigates the role of short-range order in manipulating light absorption in disordered materials with short-range order by comparing two types of disordered structures, including stealthy hyperuniform（SHU） structures and hard disk（HD） structures. Firstly, in the case of structures with different number of nanoholes, the absorptivity of two structures show different performance. HD structures are not sensitive to the system sizes, while the integrated absorption of SHU structures is improved with the number of holes increasing. Besides, as the degree of short-range order increases,the strength of Bragg scattering can be enhanced, leading to pronounced absorption peaks and further enhancing absorption in certain wavelengths. Compared with the HD structures, SHU structures are more sensitive to the degree of short-range order, showing relatively better absorption ability when considering the integrated absorption. The present study paves a way to control light absorption and scattering using novel disordered materials.