کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1540585 996664 2009 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structure of a tightly focused vortex beam in the presence of primary coma
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Structure of a tightly focused vortex beam in the presence of primary coma
چکیده انگلیسی
Structure of a tightly focused circularly polarized vortex beam in the presence of primary coma has been studied by using Debye-Wolf diffraction integral. The role of topological charge and handedness of the polarization on the focused structure has been discussed. Results have been presented for the total intensity and squares of the polarization components for left-, and right circularly polarized vortex beams. Impact of coma, on the dark core of an azimuthally polarized non-vortex beam is also investigated and compared with the dark core of a circularly polarized vortex beam. The presence of comatic aberration in the focusing system results in a positional shift of the high intensity lobes, and reduction of the intensity on one side of the center. Effect of coma on the focused structure has also been discussed in the context of STED microscopy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 282, Issue 8, 15 April 2009, Pages 1501-1510
نویسندگان
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