中国激光, 2016, 43 (12): 1203001, 网络出版: 2016-12-09
微粗糙光学表面与掩埋多体粒子复合光散射特性 下载: 616次
Composite Light Scattering Properties Between Slightly Rough OpticalSurface and Multi-Body Particles
薄膜 复合散射 光学表面 FDTD/MRTD混合方法 多体粒子 thin films composite scattering optical surface FDTD/MRTD method multi-body particles
摘要
基于时域有限差分法/时域多分辨(FDTD/MRTD)混合方法研究了微粗糙光学表面与多体缺陷粒子的复合光散射问题。建立微粗糙光学表面与掩埋多体粒子复合散射模型,利用DB2小波尺度函数的移位内插原理,将计算区域分别划分为MRTD和FDTD方法区域,推导出复合散射场,计算微粗糙光学表面中掩埋多体粒子的复合散射截面,并与矩量法的结果比较以验证该方法的有效性。分析入射角、气泡粒子的个数、相对位置及深度等物性特征对微粗糙光学表面与掩埋多体粒子复合双站散射截面的影响。上述结果为光学无损检测、光学薄膜、微纳米结构的光学性能设计等领域提供技术支持。
Abstract
Based on the finite difference time domain/multi-resolution time domain (FDTD/MRTD) method, composite scattering between slightly rough optical surface and buried multi-body defect particles was researched. The concept of multi-body defect particles is put forward and the composite scattering model of slightly rough optical surface and buried particles is established. The computational domain is divided into MRTD method domain and FDTD method domain based on displacement interpolation principle of DB2 wavelet scale function, and the composite scattering field is deduced. Composite scattering cross sections of buried multi-body particles are discussed in detail. Results are compared with those obtained with the method of moment, and they are found to be consistent very well, thereby proving the reliability of the proposed method. The effects of incidence angle, sphere number and sphere separation distance on composite scattering are studied. The study will provide technological support for the fields of nondestructive examination, optical film, optical performance design of micro- and nano- structures etc.
巩蕾, 吴振森, 葛城显, 高明, 潘永强. 微粗糙光学表面与掩埋多体粒子复合光散射特性[J]. 中国激光, 2016, 43(12): 1203001. Gong Lei, Wu Zhensen, Ge Chengxian, Gao Ming, Pan Yongqiang. Composite Light Scattering Properties Between Slightly Rough OpticalSurface and Multi-Body Particles[J]. Chinese Journal of Lasers, 2016, 43(12): 1203001.