کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5430117 | 1508706 | 2009 | 12 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: T-matrix calculation via discrete dipole approximation, point matching and exploiting symmetry T-matrix calculation via discrete dipole approximation, point matching and exploiting symmetry](/preview/png/5430117.png)
We present a method of incorporating the discrete dipole approximation (DDA) method with the point matching method to formulate the T-matrix for modelling arbitrarily shaped microsized objects. The T-matrix elements are calculated using point matching between fields calculated using vector spherical wave functions and DDA. When applied to microrotors, their discrete rotational and mirror symmetries can be exploited to reduce memory usage and calculation time by orders of magnitude; a number of optimization methods can be employed based on the knowledge of the relationship between the azimuthal mode and phase at each discrete rotational point, and mode redundancy from Floquet's theorem. A 'reduced-mode' T-matrix can also be calculated if the illumination conditions are known.
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 110, Issues 14â16, SeptemberâNovember 2009, Pages 1460-1471