Super-long photonic nanojet generated from liquid-filled hollow microcylinder

被引：66
作者：
Gu, Guoqiang [1 ,2 ]
Zhou, Rui [3 ]
Chen, Zaichun [4 ]
Xu, Huiying [1 ]
Cai, Guoxiong [5 ]
Cai, Zhiping [1 ]
Hong, Minghui [2 ]
机构：
[1] Xiamen Univ, Sch Informat Sci & Engn, Xiamen 361005, Peoples R China
[2] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117576, Singapore
[3] Xiamen Univ, Dept Mech & Elect Engn, Xiamen 361005, Peoples R China
[4] Singapore Univ Technol & Design, Singapore 138682, Singapore
[5] Xiamen Univ, Inst Electromagnet & Acoust, Xiamen 361005, Peoples R China
来源：
OPTICS LETTERS | 2015年 / 40卷 / 04期
基金：
中国国家自然科学基金; 新加坡国家研究基金会;
关键词：
DIELECTRIC MICROSPHERE; LIGHT; BACKSCATTERING; NANOPARTICLES; ENHANCEMENT; RESOLUTION; OPTICS;
D O I：
10.1364/OL.40.000625
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Photonic nanojet (PNJ) from liquid-filled hollow microcylinder (LFHM) under a liquid immersion condition is numerically investigated based on the finite element method and physically analyzed with ray optics. Simulation and analysis results show that, by simultaneously introducing the immersed liquid and filled liquid, the propagation beam is greatly flattened, and super-long PNJs with decay length more than 100 times the illumination wavelengths are obtained in the outer near-field region of the LFHM. With the variation of the refractive index contrast between the filled and immersed-liquids, the properties of the PNJs, such as the focal distance, decay length, full width at half-maximum, and maximum light intensity can be flexibly tuned. (C) 2015 Optical Society of America
引用
收藏
页码：625 / 628
页数：4
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