کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7846167 1508607 2018 25 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the validity of the use of a localized approximation for helical beams. I. Formal aspects
موضوعات مرتبط
مهندسی و علوم پایه شیمی طیف سنجی
پیش نمایش صفحه اول مقاله
On the validity of the use of a localized approximation for helical beams. I. Formal aspects
چکیده انگلیسی
The description of an electromagnetic beam for use in light scattering theories may be carried out by using an expansion over vector spherical wave functions with expansion coefficients expressed in terms of Beam Shape Coefficients (BSCs). A celebrated method to evaluate these BSCs has been the use of localized approximations (with several existing variants). We recently established that the use of any existing localized approximation is of limited validity in the case of Bessel and Mathieu beams. In the present paper, we address a warning against the use of any existing localized approximation in the case of helical beams. More specifically, we demonstrate that a procedure used to validate any existing localized approximation fails in the case of helical beams. Numerical computations in a companion paper will confirm that existing localized approximations are of limited validity in the case of helical beams.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 208, March 2018, Pages 12-18
نویسندگان
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