Laczik Z
Appl Opt. 1996 Jul 1;35(19):3736-45. doi: 10.1364/AO.35.003736.
To assess the efficiency and accuracy of light-scattering calculations based on the discrete dipole approximation (DDA) for particles with a real relative refractive index smaller than unity, differential scattering cross sections and scattering efficiency factors were calculated for spherical particles. We performed the calculations for oxide particles and voids embedded in glass and silicon, using the exact scattering theory (Mie scattering) and the DDA. A comparison of the results shows that the DDA is applicable in the above refractive-index regime, and the conditions under which DDA-based calculations can provide scattering data with good accuracy are discussed.
为了评估基于离散偶极近似（DDA）对实相对折射率小于1的粒子进行光散射计算的效率和准确性，我们计算了球形粒子的微分散射截面和散射效率因子。我们使用精确散射理论（米氏散射）和DDA对嵌入玻璃和硅中的氧化物颗粒和空隙进行了计算。结果比较表明，DDA适用于上述折射率范围，并讨论了基于DDA的计算能够提供高精度散射数据的条件。
