Fabrication and characterization of high-quality spiral phase plates for optical applications

被引:82
作者
Massari, M. [1 ]
Ruffato, G. [1 ,2 ]
Gintoli, M. [2 ]
Ricci, F. [1 ,3 ]
Romanato, F. [2 ,4 ]
机构
[1] Veneto Nanotech, Lab Nanofabricat Nanodevices LaNN, I-35127 Padua, Italy
[2] Univ Padua, Dept Phys & Astron G Galilei, I-35131 Padua, Italy
[3] ICFO Inst Photon Sci, Castelldefels 08860, Spain
[4] CNR INFM TASC IOM Natl Lab, I-34012 Trieste, Italy
关键词
ORBITAL ANGULAR-MOMENTUM; LAGUERRE-GAUSSIAN MODES; LIGHT-BEAMS; LASER-BEAMS; GENERATION; INTERFERENCE; LITHOGRAPHY; ASTRONOMY; VORTICES; ELECTRON;
D O I
10.1364/AO.54.004077
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The discovery that light beams with a helical phase front carry orbital angular momentum (OAM) has enabled applications in many fields ranging from optical manipulation to quantum information processing and, recently, free-space information transfer and communications. Here, a novel three-dimensional fabrication process by electron beam lithography was finely tuned in order to realize high-quality spiral phase plates (SPPs) for the generation of OAM-carrying optical beams. Single-and multi-step SPPs have been realized for the generation of high-order Laguerre-Gaussian beams with different values of topological charge and radial index. The optical response of these optical elements was experimentally investigated and compared with theoretical models. (C) 2015 Optical Society of America
引用
收藏
页码:4077 / 4083
页数:7
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