光学
磁化
数值孔径
同质性(统计学)
法拉第笼
材料科学
磁场
横截面
梁(结构)
物理
波长
统计
数学
量子力学
结构工程
工程类
作者
Weichao Yan,Zhongquan Nie,Xueru Zhang,Yuxiao Wang,Song Ye
出处
期刊:Journal of Optics
[IOP Publishing]
日期:2017-07-14
卷期号:19 (8): 085401-085401
被引量:18
标识
DOI:10.1088/2040-8986/aa73ce
摘要
Based on the vector diffraction theory and the inverse Faraday effect in the magneto-optic film, light-induced magnetization distributions, for a high numerical aperture focusing configuration with an azimuthally polarized beam modulated by an optimized pure multi-zone plate phase filter, are investigated. By making use of the compeletely destructive interference of its inter circle with the π phase shift between adjacent sub-annuli, and the capability to extend the constructive interference in the propagating direction through its narrow outer annulus modulated by three misplaced helical phases, an ultralong () magnetization needle with both transverse super-resolution () and uniform axial field strength is achieved in the focal region. The perfect magnetization needle and the accessible method give a guide for ultrahigh density magnetic storage, fabricating magnetic lattices for spin wave operation, as well as atomic trapping.
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