Subwavelength focusing by a micro/nanofiber array

被引：27
作者：
Wang, Xiao [1 ]
Fu, Jian [1 ]
Liu, Xu [1 ]
Tong, Li-Min [1 ]
机构：
[1] Zhejiang Univ, Dept Opt Engn, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Peoples R China
来源：
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION | 2009年 / 26卷 / 08期
基金：
中国国家自然科学基金;
关键词：
EVANESCENT FIELD; DIAMETER SILICA; NANOWIRES; LENSLESS; INDEX;
D O I：
10.1364/JOSAA.26.001827
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Utilizing the diffraction property of the output light from micro/nano fibers (MNFs), a new scheme based on a MNF array to focus optical beams with subwavelength resolution in the far field is proposed. By using the three-dimensional finite-difference beam-propagation method (FD-BPM), we investigated the diffraction interference effect of the MNFs during light propagation. The numerical stimulation demonstrates a focusing spot with FVHM of 0.43 lambda at a distance of 9 lambda from the output endface of MNF array. The effects of the characteristics of the array, the MNFs, and the input optical field on focusing are analyzed in detail. (C) 2009 Optical Society of America
引用
收藏
页码：1827 / 1833
页数：7
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