| タイトル | Finite-Difference Time Domain Solution of Light Scattering and Absorption by Particles in an Absorbing Medium |
| 著者（英） | Sun, W.; Loeb, N. G.; Fu, Q. |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 2002-01-01 |
| 言語 | eng |
| 内容記述 | The three-dimensional (3-D) finite-difference time-domain (FDTD) technique has been extended to simulate light scattering and absorption by nonspherical particles embedded in an absorbing dielectric medium. A uniaxial perfectly matched layer (UPML) absorbing boundary condition is used to truncate the computational domain. When computing the single-scattering properties of a particle in an absorbing dielectric medium, we derive the single-scattering properties including scattering phase functions, extinction, and absorption efficiencies using a volume integration of the internal field. A Mie solution for light scattering and absorption by spherical particles in an absorbing medium is used to examine the accuracy of the 3-D UPML FDTD code. It is found that the errors in the extinction and absorption efficiencies from the 3-D UPML FDTD are less than similar to 2%. The errors in the scattering phase functions are typically less than similar to 5%. The errors in the asymmetry factors are less than similar to 0.l%. For light scattering by particles in free space, the accuracy of the 3-D UPML FDTD scheme is similar to a previous model. |
| NASA分類 | Optics |
| 権利 | No Copyright |
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