Multiple scattering transmission characteristic of polarized light in ellipsoidal fine particles
-
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。
Abstract:To investigate the multiple scattering transmission characteristics of polarized light in ellipsoidal fine particles, a simulation and experiment verification system for black carbon aerosol particles was established. The polarization transmission characteristic after multiple scattering of the randomly oriented ellipsoidal fine particles are studied by combining the T-matrix with the Monte Carlo method. A half-real simulation testing environment was established to verify the simulation algorithm, and the ellipsoidal fine particles were prepared by extending ganoderma lucidum spores′ burning time. The size distribution and optical thickness of the ellipsoidal fine particles were measured by Malvern Spraytec and a light power meter, respectively. The simulation results can be proven by combining the experiment with the simulation. The results show that with an increase in the concentration of black carbon ellipsoidal fine particles, the Degree Of Polarization (DOP) of the horizontal, vertical, 45° linearly polarized and the right circularly polarized light all decrease, and the polarization preservation ability of three kinds of linear polarizations are basically consistent. The polarization preservation ability of the circularly polarized light gradually exceeds the linearly polarized light with an increase in concentration. The gap between the linear and circular polarizations becomes larger as it reaches its maximum value at 3.12 optical thickness. When the optical thickness is greater than 3.12, the DOP difference between the circularly and the linearly polarized lights tend to be stable. By calculation, the percent agreement between the simulation and the experiment is better than 70.84%. These results can expand the environmental applicable range of polarization detection and provide theoretical support for studying the polarization detection of atmospheric non-spherical particles.
-
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- 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 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/s Transmittance/% Optical thickness 1 79.5 0.23 2 47.2 0.75 3 24.2 1.42 4 16.0 1.83 5 9.4 2.36 6 4.4 3.12 7 3.0 3.51 8 1.9 3.98 
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 polarization Percent agreement 0° linear polarization 71.60% Right-hand circular polarization 70.84%
下载: 导出CSV
-
[1] 任智慧, 钟绵增, 杨珏晗, 等. 基于AsP/MoS2异质结的偏振光电探测器[J]. 中国光学,2021,14(1):135-144. doi: 10.37188/CO.2020-0189REN ZH H, ZHONG M Z, YANG J H, et al. A polarization-sensitive photodetector based on a AsP/MoS2 heterojunction[J]. Chinese Optics, 2021, 14(1): 135-144. (in Chinese) doi: 10.37188/CO.2020-0189 [2] 周文舟, 范晨, 胡小平, 等. 多尺度奇异值分解的偏振图像融合去雾算法与实验[J]. 中国光学,2021,14(2):298-306. doi: 10.37188/CO.2020-0099ZHOU W ZH, FAN CH, HU X P, et al. Multi-scale singular value decomposition polarization image fusion defogging algorithm and experiment[J]. Chinese Optics, 2021, 14(2): 298-306. (in Chinese) doi: 10.37188/CO.2020-0099 [3] 张肃, 付强, 战俊彤, 等. 红外波段下湿度对偏振光传输特性的影响[J]. 光子学报,2017,46(5):0526001. doi: 10.3788/gzxb20174605.0526001ZHANG S, FU Q, ZHAN J T, et al. Humidity on transmission characteristics influence of polarized light under infrared wavelengths[J]. Acta Photonica Sinica, 2017, 46(5): 0526001. (in Chinese) doi: 10.3788/gzxb20174605.0526001 [4] VAN DER LAAN J D, WRIGHT J B, KEMME S A, et al. Superior signal persistence of circularly polarized light in polydisperse, real-world fog environments[J]. Applied Optics, 2018, 57(19): 5464-5473. doi: 10.1364/AO.57.005464 [5] ZENG X W, CHU J K, CAO W D, et al. Visible–IR transmission enhancement through fog using circularly polarized light[J]. Applied Optics, 2018, 57(23): 6817-6822. doi: 10.1364/AO.57.006817 [6] 张秀再, 翟梦思, 周丽娟. 黑碳气溶胶对星地量子链路通信性能的影响[J]. 光学学报,2021,41(11):1127001. doi: 10.3788/AOS202141.1127001ZHANG X Z, ZHAI M S, ZHOU L J. Influence of black carbon aerosol on performance of satellite-ground quantum link communication[J]. Acta Optica Sinica, 2021, 41(11): 1127001. (in Chinese) doi: 10.3788/AOS202141.1127001 [7] 赵太飞, 王世奇, 张健伟, 等. 非球形灰霾的紫外脉冲回波特性[J]. 光子学报,2020,49(8):0801001. doi: 10.3788/gzxb20204908.0801001ZHAO T F, WANG SH Q, ZHANG J W, et al. Characteristics of ultraviolet pulse echo on non-spherical haze[J]. Acta Photonica Sinica, 2020, 49(8): 0801001. (in Chinese) doi: 10.3788/gzxb20204908.0801001 [8] YANG P, LIOU K N. Light scattering by hexagonal ice crystals: comparison of finite-difference time domain and geometric optics models[J]. Journal of the Optical Society of America A, 1995, 12(1): 162-176. doi: 10.1364/JOSAA.12.000162 [9] DRAINE B T. The discrete-dipole approximation and its application to interstellar graphite grains[J]. The Astrophysical Journal, 1988, 333(2): 848. [10] MISHCHENKO M I, TRAVIS L D. Capabilities and limitations of a current FORTRAN implementation of the T-matrix method for randomly oriented, rotationally symmetric scatterers[J]. Journal of Quantitative Spectroscopy and Radiative Transfer, 1998, 60(3): 309-324. doi: 10.1016/S0022-4073(98)00008-9 [11] 于婷, 战俊彤, 马莉莉, 等. 椭球形粒子浓度对 偏振传输特性的影响[J]. 中国 ,2019,46(2):0208002. doi: 10.3788/CJL201946.0208002YU T, ZHAN J T, MA L L, et al. Effect of ellipsoidal particle concentration on laser polarization transmission characteristics[J]. Chinese Journal of Lasers, 2019, 46(2): 0208002. (in Chinese) doi: 10.3788/CJL201946.0208002 [12] 胡帅, 高太长, 刘磊, 等. 偏振光在非球形气溶胶中传输特性的Monte Carlo仿真[J]. 物理学报,2015,64(9):094201. doi: 10.7498/aps.64.094201HU SH, GAO T CH, LIU L, et al. Simulation of radiation transfer properties of polarized light in non-spherical aerosol using Monte Carlo method[J]. Acta Physica Sinica, 2015, 64(9): 094201. (in Chinese) doi: 10.7498/aps.64.094201 [13] 胡帅, 高太长, 李浩, 等. 非球形气溶胶对近红外偏振辐射传输的影响及等效球形误差分析[J]. 红外与毫米波学报,2017,36(2):235-245. doi: 10.11972/j.issn.1001-9014.2017.02.018HU SH, GAO T CH, LI H, et al. Analysis on the impact of non-spherical aerosol on polarized radiative transfer in near-infrared band and its equivalent-sphere errors[J]. Journal of Infrared and Millimeter Waves, 2017, 36(2): 235-245. (in Chinese) doi: 10.11972/j.issn.1001-9014.2017.02.018 [14] LIU X J, CHEN X W, ZHAO C Y, et al. Polarized light transport in anisotropic media composed of ellipsoids: Influence of structural anisotropy[J]. Journal of Quantitative Spectroscopy and Radiative Transfer, 2020, 245: 106854. doi: 10.1016/j.jqsrt.2020.106854 [15] 王玲. 大气气溶胶化学成分地基遥感反演研究—以京津唐地区为例[D]. 南京: 南京大学, 2013.WANG L. Retrieval of aerosol chemical composition from ground-based remote sensing data-an application in Jing-Jin-Tang region[D]. Nanjing: Nanjing University, 2013. (in Chinese) [16] RAMELLA-ROMAN J C, PRAHL S A, JACQUES S L. Three Monte Carlo programs of polarized light transport into scattering media: part I[J]. Optics Express, 2005, 13(12): 4420-4438. doi: 10.1364/OPEX.13.004420 [17] 马莉莉, 段锦, 于婷, 等. 椭球粒子烟雾浓度对 偏振度影响的实验研究[J]. 应用光学,2018,39(6):921-928.MA L L, DUAN J, YU T, et al. Experimental study on impact of ellipsoidal particle smoke concentration on laser DOP[J]. Journal of Applied Optics, 2018, 39(6): 921-928. (in Chinese) [18] ZHANG S, ZHAN J T, FU Q, et al. Effects of environment variation of glycerol smoke particles on the persistence of linear and circular polarization[J]. Optics Express, 2020, 28(14): 20236-20248. doi: 10.1364/OE.395428 [19] ZHANG S, ZHAN J T, FU Q, et al. Propagation of linear and circular polarization in a settling smoke environment: theory and experiment[J]. Applied Optics, 2019, 58(17): 4687-4694. doi: 10.1364/AO.58.004687 [20] DALZELL W H, SAROFIM A F. Optical constants of soot and their application to heat-flux calculations[J]. Journal of Heat Transfer, 1969, 91(1): 100-104. doi: 10.1115/1.3580063 -
下载:
点击查看大图
计量
- 文章访问数: 273
- HTML全文浏览量: 269
- PDF下载量: 235
- 被引次数: 0
