Working mechanism of Sb thin films in super-resolution near-field structure

被引：9

作者：

Wei, JS ^{[1
]}

Wang, Y ^{[1
]}

Xu, WD ^{[1
]}

Zhou, F ^{[1
]}

Zhang, F ^{[1
]}

Gan, FX ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2003年 / 224卷 / 4-6期

基金：

中国国家自然科学基金;

关键词：

Sb thin films; thermal lens; super-resolution;

D O I：

10.1016/j.optcom.2003.07.018

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

According to the change of refractive index of Sb thin film with temperature and the radial distribution of ternperature within the spot, we consider the dynamic optical aperture as a self-focusing thermal lens of Sb thin film in super-resolution near-field structure of SiN/Sb/SiN, and obtain the radius of the dynamic optical aperture (self-focusing thermal lens) 80 nm, the focusing length 22.5 nm, and the diameter of spot through the self-focusing thermal lens 100 nm by setting the Sb thin film thickness 30 run, laser power 2 mW, and irradiation time on the Sb thin film 1.45 ns. At the same time, the intensity of spot focused by the self-focusing thermal lens of Sb thin films can be greatly enhanced. The working mechanism of Sb thin film in super-resolution near-field structure of SiN/Sb/SiN has been explained. (C) 2003 Published by Elsevier B.V.

引用

页码：269 / 273

页数：5

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