基于Mie理论的Ag_(2)O颗粒辐射特性研究  

Study on Radiative Properties of Ag_(2)O Particles Based on Mie Theory

作　　者：靳亚斌 徐甜甜 张乐 李洁 薛成坤 JIN Yabin;XU Tiantian;ZHANG Le;LI Jie;XUE Chengkun(School of Energy and Architecture,Xi′an Aeronautical Institute,Xi′an 710077,China)

机构地区：[1]西安航空学院能源与建筑学院,西安710077

出　　处：《西安航空学院学报》2024年第5期71-78,共8页Journal of Xi’an Aeronautical Institute

基　　金：陕西省自然科学青年基金(2022JQ-327);陕西省教育厅专项科研基金(22JK0425);西安航空学院校级项目(2021KY0228)。

摘　　要：通过结合第一性原理和Mie理论,对微米级Ag_(2)O颗粒的辐射特性进行了理论计算,以分析尺度参数对其辐射特性的影响。结果表明:入射光波长约为0.5μm是Ag_(2)O颗粒的电子的活跃区和明显的吸光区;当入射光波长为1.2μm时,随着尺度参数的增大,Ag_(2)O颗粒的辐射特性呈振荡变化,其散射相函数的振荡随尺度参数的增大而加剧,且在尺度参数为15时接近于几何散射;入射光波长相同时,随着粒径的增大,Ag_(2)O颗粒的消光系数和散射系数均先快速增大后缓慢减小;非均匀(f_(v)=0.2)Ag_(2)O粒子系的消光截面大于散射截面,且整体上来讲消光截面和散射截面均随着入射光波长的增大而减小,入射光波长较小时散射相函数表现为显著的向前散射,随着入射波长的增大散射相函数呈现均匀分布。By combining first-principles calculations with Mie theory,the radiative properties of micrometer-scale Ag_(2)O particles are theoretically calculated to analyze the impact of the size parameter on their radiative characteristics.The results show that the incident light wavelength of approximately 0.5μm is the active region for electrons and a significant absorption region for Ag_(2)O particles.When the incident light wavelength is 1.2μm,the radiative properties of Ag_(2)O particles exhibit oscillatory changes with the increase of the size parameter,and the oscillation of the scattering phase function intensifies with the increase of the size parameter,approaching geometric scattering at a size parameter of 15.At the same incident light wavelength,both the extinction and scattering coefficients of Ag_(2)O particles increase rapidly and then slowly decrease with the increase of particle size.For a non-uniform(f_(v)=0.2)Ag_(2)O particle system,the extinction cross-section is greater than the scattering cross-section,and overall,both the extinction and scattering cross-sections decrease with the increase of the incident light wavelength.The scattering phase function exhibits significant forward scattering at shorter incident wavelengths and becomes uniformly distributed as the incident wavelength increases.

关 键 词：MIE理论 Ag_(2)O 辐射特性 第一性原理 

分 类 号：O439.2[机械工程—光学工程]