光学
涡流
物理
旋涡
分辨率(逻辑)
梁(结构)
计算机科学
热力学
人工智能
作者
Zhongquan Nie,Guang Rong Shi,Dongyu Li,Xueru Zhang,Yuxiao Wang,Yinglin Song
出处
期刊:Journal of Optics
[IOP Publishing]
日期:2015-05-01
卷期号:17 (5): 055605-055605
被引量:3
标识
DOI:10.1088/2040-8978/17/5/055605
摘要
The intensity profiles near the focus of a 4? high numerical aperture focusing configuration for two counter-propagating radially polarized hollow Gaussian (HG) vortex beams are examined numerically. Theoretical calculations manifest that, in contrast to the single-objective focusing system, a three-dimensional super-resolution focal spot with purely transverse polarization can be formed. Such an unusual pattern stems from combining the faultlessly destructive interference of the longitudinal component of the electric field with the constructive interference of the transverse components (azimuthal and radial components) created by the two counter-propagating radially polarized vortex beams, as well as benefits from the higher-order HG mode (e.g., n?=?4) to govern the aspect ratio of the focal spot. Moreover, the tolerances on focusing performance for modest displacement from the center of the HG beams with different orders are researched in detail. We expect that such a three-dimensional super-resolution field with transverse polarization can be extensively used in super-resolution confocal microscopy and three-dimensional high-density optical storage.
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