کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7927961 | 1512551 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Analysis of electromagnetic focusing properties of multi-annular nanostructured metasurfaces
ترجمه فارسی عنوان
تجزیه و تحلیل خواص فیزیکی الکترومغناطیسی متوسارهای نانوساختار چند حلقه ای
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
چکیده انگلیسی
To explore the electromagnetic focusing properties of multi-annular nanostructured metasurfaces, the material property, dispersion property, and error-tolerance property have been studied through a combination of the vectorial angular spectrum theory and the three-dimensional finite-difference time-domain (FDTD) method. An obvious focal shift has been observed and the thickness for the Ag, Al, and Au films is suggested to be within the range of 50-100Â nm for the illumination wavelength of 640Â nm. The light dispersion effect of the metasurface is remarkable and the focal length decreases with the increase of the wavelength; however, the on-axis intensity distributions retain a similar, shifted shape when the wavelength deviation is less than 10Â nm. The fabrication error has a strong impact on the on-axis intensity distribution; when it occurs for the middle annulus, a more severe impact will be induced. The above findings provide theoretical guidance for applying multi-annular metasurfaces in the fields of super-resolution focusing, micro-nano fabrication, and nanoscopic imaging.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 372, 1 August 2016, Pages 166-171
Journal: Optics Communications - Volume 372, 1 August 2016, Pages 166-171
نویسندگان
Shuming Yang, Tong Wang, Tao Liu, Zhuangde Jiang,