Axial multifocal binary-phase zone plate for high numerical aperture focusing

被引：5

作者：

Huang, Zhenxian ^{[1
]}

Hao, Zhiqiang ^{[1
]}

Zhu, Linwei ^{[2
]}

机构：

[1] Tianjin Univ Commerce, Coll Sci, 409 Guangrong Rd, Tianjin 300134, Peoples R China

[2] Ludong Univ, Sch Phys & Optoelect Engn, 186 Middle Hongqi Rd, Yantai 264025, Shandong, Peoples R China

来源：

OPTICAL ENGINEERING | 2016年 / 55卷 / 12期

基金：

中国国家自然科学基金;

关键词：

zone plate; high numerical aperture objective; optical needle; multifocal spots; PURE LONGITUDINAL MAGNETIZATION; VECTOR BEAMS; ELECTROMAGNETIC DIFFRACTION; POLARIZED-LIGHT; OPTICAL SYSTEMS; GENERATION; NEEDLE; FIELD; SPOT; SUPERRESOLUTION;

D O I：

10.1117/1.OE.55.12.123101

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Binary-phase zone plates (BPZPs) are proposed for generating two foci along the optical axis of a high numerical aperture objective. The radii of BPZPs are given by an analytical expression, in which the axial shifting distance of two foci is included. By changing the axial shifting distance, a set of BPZPs can be designed for achieving tunable two foci in the optical axial direction of the objective. Theoretical analysis and simulation results prove that the tunable axial two foci can be realized successfully, and furthermore, the intensity distribution of focal spots with special shapes (optical needle and optical bubble) can also be created by using BPZPs with suitable axial shifting distance. In addition, axial multifocal spots array can also be realized by superposition of multiple BPZPs with different axial shifting distances. (C) 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)

引用

页数：6

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