Analysis of extinction characteristics of non-spherical biological particle aggregates [Invited]  

作　　者：陈国龙 顾有林 胡以华 孟凡昊 丁婉莹 张熙 Guolong Chen;Youlin Gu;Yihua Hu;Fanhao Meng;Wanying Ding;Xi Zhang(National University of Defense Technology,Hefei 230037,China;State Key Laboratory of Pulsed Power Laser Technology,National University of Defense Technology,Hefei 230037,China;Advanced Laser Technology Laboratory of Anhui Province,Hefei 230037,China)

机构地区：[1]National University of Defense Technology,Hefei 230037,China [2]State Key Laboratory of Pulsed Power Laser Technology,National University of Defense Technology,Hefei 230037,China [3]Advanced Laser Technology Laboratory of Anhui Province,Hefei 230037,China

出　　处：《Chinese Optics Letters》2023年第9期21-27,共7页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.62075241);the Advanced Laser Technology Laboratory Foundation of Anhui Province of China (No.20191003)。

摘　　要：In this study,a method was presented to accurately obtain the extinction characteristics of the non-spherical biological particle aggregates.Based on the multi-sphere particle model of non-spherical particles,a randomly oriented aggregation model was firstly built to construct the aggregates.The discrete-dipole approximation method was used to calculate the extinction characteristics of aggregates in the 3–14 μm waveband.The average mass extinction coefficients of three materials are 0.802 m~2/g,0.907 m~2/g,and 0.866 m~2/g in the 3–5 μm waveband and 0.590 m~2/g,0.402 m~2/g,and 0.523 m~2/g in the8–14 μm band,respectively.Smoke chamber experimental results are in good agreement with theoretical analyses.

关 键 词：non-spherical aggregates biological particle random orientation extinction characteristics 

分 类 号：TB34[一般工业技术—材料科学与工程]