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偏振光在椭球细粒子中多次散射传输特性

王鹏程 张肃 申成彪 战俊彤 段锦 李英超 刘壮

王鹏程, 张肃, 申成彪, 战俊彤, 段锦, 李英超, 刘壮. 偏振光在椭球细粒子中多次散射传输特性[J]. 中国光学(中英文), 2023, 16(2): 348-357. doi: 10.37188/CO.2022-0144
引用本文: 王鹏程, 张肃, 申成彪, 战俊彤, 段锦, 李英超, 刘壮. 偏振光在椭球细粒子中多次散射传输特性[J]. 中国光学(中英文), 2023, 16(2): 348-357. doi: 10.37188/CO.2022-0144
WANG Peng-cheng, ZHANG Su, SHEN Cheng-biao, ZHAN Jun-tong, DUAN Jin, LI Ying-chao, LIU Zhuang. Multiple scattering transmission characteristic of polarized light in ellipsoidal fine particles[J]. Chinese Optics, 2023, 16(2): 348-357. doi: 10.37188/CO.2022-0144
Citation: WANG Peng-cheng, ZHANG Su, SHEN Cheng-biao, ZHAN Jun-tong, DUAN Jin, LI Ying-chao, LIU Zhuang. Multiple scattering transmission characteristic of polarized light in ellipsoidal fine particles[J]. Chinese Optics, 2023, 16(2): 348-357. doi: 10.37188/CO.2022-0144

偏振光在椭球细粒子中多次散射传输特性

doi: 10.37188/CO.2022-0144
基金项目: 国家自然科学基金(No. 61905025,No. 61890963);吉林省科技厅项目(No. 20210201093GX,No. 20200201261JC);吉林省教育厅项目(No. JJKH20220737KJ,No. JJKH20220738KJ)
详细信息
    作者简介:

    王鹏程(1998—),男,吉林长春人,硕士研究生,2020年于长春理工大学获得学士学位,主要从事大气偏振传输方面的研究。E-mail:1352499681@qq.com

    张 肃(1985—),女,吉林长春人,博士,副教授,博士生导师,2014年于长春理工大学获得光学工程博士学位,主要从事大气光学、偏振传输方面的研究。E-mail:susiezhang21@126.com

  • 中图分类号: O436.3

Multiple scattering transmission characteristic of polarized light in ellipsoidal fine particles

Funds: Supported by National Natural Science Foundation of China (No. 61905025, No. 61890963); Department of Science and Technology of Jilin Province (No. 20210201093GX, No. 20200201261JC); Education Department Project of Jilin Province (No. JJKH20220737KJ, No. JJKH20220738KJ)
More Information
  • 摘要:

    为了研究偏振光在椭球细粒子中多次散射的传输特性,建立了以黑碳气溶胶粒子为对象的仿真与实验验证系统。采用T矩阵和蒙特卡罗相结合的方法,对偏振光经随机取向椭球细粒子多次散射后的偏振传输特性进行仿真研究,建立半实物模拟测试平台对仿真方法进行验证,采用延长灵芝孢子燃烧时间的方式制备椭球细粒子,分别由马尔文粒度仪和光功率计测试椭球细粒子的尺寸分布和光学厚度,建立实验与仿真间的联系,验证了仿真结果的正确性。结果表明:随着黑碳椭球细粒子浓度的增加,水平、垂直、+45°线偏光和右旋圆偏光的偏振度都随之下降,且3种线偏振光的保偏性基本一致;随着浓度的增大,圆偏振光的保偏性逐渐优于线偏振光,且两者保偏性差距越来越大,在光学厚度为3.12时达到最大值,当光学厚度大于3.12时,圆偏光和线偏光的偏振度差值趋于稳定。经计算,仿真与实验结果符合度优于70.84%。本研究结果可扩展偏振探测的适用范围,为非球形颗粒物环境下偏振探测研究提供理论支撑。

     

  • 图 1  仿真过程示意图

    Figure 1.  Schematic diagram of simulation process

    图 2  电镜下的黑碳气溶胶粒子

    Figure 2.  Black carbon aerosol particles obtained by electron microscope

    图 3  椭球细粒子多次散射实验原理图。1-激光器,2-衰减片,3-偏振片,4-1/4波片,5-环境模拟系统,6-偏振无关分光棱镜,7-光功率计,8-偏振态测量仪,9-计算机

    Figure 3.  Experimental schematic diagram of multiple scattering of ellipsoidal fine particles. 1- Laser, 2- Attenuator, 3- Linear polarizer, 4-Quarter wave-plate, 5- Environmental simulation system,6- Non-polarizing beam splitter cube, 7- Light power meter, 8- Polarimeter, 9- Computer

    图 4  实验装置实物图

    Figure 4.  Experimental device

    图 5  采样5分钟的出射光强度

    Figure 5.  Intensity of emergent light with the sampling time of 5 min

    图 6  光学厚度与充入时间关系

    Figure 6.  Relationship between optical thickness and filling time

    图 7  椭球粒子尺寸分布情况

    Figure 7.  Size distributions of ellipsoidal particles

    图 8  偏振度与光学厚度关系仿真图

    Figure 8.  Relationship between degree of polarization and optical thickness

    图 9  偏振度差值$ {\varDelta _{{\text{diff}}}} $与光学厚度的关系

    Figure 9.  Relationship between degree of polarization difference $ {\varDelta _{{\text{diff}}}} $ and optical thickness

    图 10  偏振度与光学厚度关系实验图

    Figure 10.  Relationship between degree of polarization and optical thickness

    表  1  不同充入时间下的光学厚度值

    Table  1.   Optical thicknesses under different filling times

    Filling time/sTransmittance/%Optical thickness
    179.50.23
    247.20.75
    324.21.42
    416.01.83
    59.42.36
    64.43.12
    73.03.51
    81.93.98
    下载: 导出CSV

    表  2  仿真与实验的符合度

    Table  2.   Percent agreement between simulation and experiment results

    State of polarizationPercent agreement
    0° linear polarization71.60%
    Right-hand circular polarization70.84%
    下载: 导出CSV
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  • 收稿日期:  2022-06-24
  • 修回日期:  2022-08-10
  • 网络出版日期:  2022-10-28

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