Sub wavelength multiple focal spot generation of high NA objective lens using diffractive optical element

被引：0
|
作者：
Suresh, P. [1 ]
Rajesh, K. B. [2 ]
Pillai, T. V. S. [3 ]
Mohideen, K. Asan [1 ]
Teen, Y. P. Arul [4 ]
机构：
[1] Natl Coll Engn, Dept ECE, Tirunelveli 627151, Tamil Nadu, India
[2] Chikkanna Govt Arts Coll, Dept Phys, Tirupur 641602, Tamil Nadu, India
[3] Univ Coll Engn, Dept Phys, Nagercoil 629004, Tamil Nadu, India
[4] Univ Coll Engn, Dept ECE, Nagercoil 629004, Tamil Nadu, India
来源：
OPTIK | 2014年 / 125卷 / 15期
关键词：
Polarization; Optical element; Focal spot; LONGITUDINAL-FIELD; POLARIZATION; FOCUS; ACCELERATION; AXICON; DEPTH; LIGHT; BEAMS;
D O I：
10.1016/j.ijleo.2013.12.088
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this article, based on the vector diffraction theory, the effect of specially designed phase modulating optical element by means of an incident tightly focused azimuthally polarized Bessel Gaussian beam in the focal region of high NA lens is investigated numerically. It is observed, that a specially designed diffractive optical modulation element (DOE) can generate multiple focal spot segment of transversely polarized in the focal region by controlling the angles of DOE. Such kind of sub wavelength transversely polarized focal spots segment may find wide applications in multiple optical traps and optical manipulation technology. (C) 2014 Elsevier GmbH. All rights reserved.
引用
收藏
页码：3829 / 3832
页数：4
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