All-optical magnetic superresolution with binary pupil filters

被引：25
|
作者：
Zhang, Yaoju [1 ,2 ,3 ]
Okuno, Yoichi [2 ,3 ]
Xu, Xun [2 ,3 ]
机构：
[1] Wenzhou Univ, Coll Phys & Elect Informat, Wenzhou 325035, Peoples R China
[2] Kumamoto Univ, Grad Sch Sci & Technol, Kumamoto, Japan
[3] Kumamoto Univ, Dept Elect & Comp Engn, Kumamoto, Japan
来源：
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2009年 / 26卷 / 07期
基金：
中国国家自然科学基金;
关键词：
SOLID IMMERSION LENS; ONLY FILTER; FOCAL DEPTH; FIELD; SYSTEMS; DIFFRACTION; ELEMENTS; STORAGE; MEDIA;
D O I：
10.1364/JOSAB.26.001379
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A method to produce magnetic superresolution in all-optical magnetic storage is proposed. Two-zone amplitude-only and phase-only filters are designed to improve the quality of the superresolved magnetization pattern, to increase the magnetic spot intensity, to reduce the magnetic spot size, and to control the sidelobe effect. A procedure for designing a rotationally symmetric pupil-plane mask to control the magnetization intensity distribution near focus is presented. As a practical implementation, we have applied our method to obtain superresolving two-zone phase filters that can improve the all-optical magnetic recording density. (C) 2009 Optical Society of America
引用
收藏
页码：1379 / 1383
页数：5
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