Improving the recording ability of a near-field optical storage system by higher-order radially polarized beams

被引：82
|
作者：
Zhang, Yaoju [1 ]
Bai, Jianping [2 ]
机构：
[1] Wenzhou Univ, Coll Phys & Elect Informat, Wenzhou 325035, Peoples R China
[2] Nanyang Normal Coll, Sch Phys & Elect Engn, Nanyang 472000, Peoples R China
来源：
OPTICS EXPRESS | 2009年 / 17卷 / 05期
基金：
中国国家自然科学基金;
关键词：
SOLID IMMERSION LENS; ELECTROMAGNETIC DIFFRACTION; ONLY FILTER; FOCAL DEPTH; MIRROR; MICROSCOPY; APERTURE; LIGHT; GENERATION; AMPLITUDE;
D O I：
10.1364/OE.17.003698
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Distributions of the optical field in a solid immersion lens recording system are calculated for higher-order radially polarized modes of the incidence. Results show that two higher-order radially polarized modes of R-TEM11* and R-TEM21* are useful to near-field optical recording, but further higher-order modes such as R-TEM31*, R-TEM41*, and R-TEM51* are not useful due to the strong side-lobe intensity. Compared with R-TEM01* beam focusing, the full width at half-maximum of the recording spot is decreased markedly and the focal depth is increased substantially by using R-TEM11* beam focusing. The effect of the beam width of the R-TEM11* mode is also discussed. (C) 2009 Optical Society of America
引用
收藏
页码：3698 / 3706
页数：9
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