کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
5427003 1397241 2018 9 صفحه PDF ندارد دانلود رایگان
عنوان انگلیسی مقاله
Accurate expansion of cylindrical paraxial waves for its straightforward implementation in electromagnetic scattering
کلمات کلیدی
Focal waves; Diffraction; Wave expansion;
موضوعات مرتبط
مهندسی و علوم پایه شیمی طیف سنجی
پیش نمایش صفحه اول مقاله
Accurate expansion of cylindrical paraxial waves for its straightforward implementation in electromagnetic scattering
چکیده انگلیسی

•Paraxial beams are represented in a series expansion in terms of Bessel wave functions.•The coefficients of the series expansion can be analytically determined by using the pattern in the focal plane.•In particular, Gaussian beams and apertured wave fields have been critically examined.•This representation of the wave field is adequate for scattering problems with shaped beams.

The evaluation of vector wave fields can be accurately performed by means of diffraction integrals, differential equations and also series expansions. In this paper, a Bessel series expansion which basis relies on the exact solution of the Helmholtz equation in cylindrical coordinates is theoretically developed for the straightforward yet accurate description of low-numerical-aperture focal waves. The validity of this approach is confirmed by explicit application to Gaussian beams and apertured focused fields in the paraxial regime. Finally we discuss how our procedure can be favorably implemented in scattering problems.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 204, January 2018, Pages 206-214
نویسندگان
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