Transverse intensity at the tight focus of a second-order cylindrical vector beam

In this paper, an effect of a reverse energy flow at the focus of a second-order cylindrical vector beam which passed through amplitude zone plate was investigated with a scanning near-field optical microscope. A comparison of the intensity distribution detected with a pyramidal metallized cantileve...

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Bibliographic Details
Published inKompʹûternaâ optika Vol. 45; no. 2; pp. 165 - 171
Main Authors Kozlova, E.S., Stafeev, S.S., Fomchenkov, S.A., Podlipnov, V.V., Kotlyar, V.V.
Format Journal Article
LanguageEnglish
Published Samara National Research University 01.04.2021
Subjects
backflow region
fdtd method
scanning near-field optical microscopy
vector beam
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Summary:In this paper, an effect of a reverse energy flow at the focus of a second-order cylindrical vector beam which passed through amplitude zone plate was investigated with a scanning near-field optical microscope. A comparison of the intensity distribution detected with a pyramidal metallized cantilever with a hole and the characteristics of the light field calculated using a FDTD method and the Richards-Wolf formulas suggests that the cantilever is sensitive to the transverse intensity component rather than the total intensity or the components of the Poynting vector in the backflow region.
ISSN:0134-2452
2412-6179
DOI:10.18287/2412-6179-CO-835