Geometric phase shaping of terahertz vortex beams

被引：40
|
作者：
Minasyan, Amalya [1 ]
Trovato, Clement [1 ]
Degert, Jerome [1 ]
Freysz, Eric [1 ]
Brasselet, Etienne [1 ]
Abraham, Emmanuel [1 ]
机构：
[1] Univ Bordeaux, CNRS, LOMA, UMR 5798, F-33400 Talence, France
来源：
OPTICS LETTERS | 2017年 / 42卷 / 01期
关键词：
OPTICAL RECTIFICATION; GENERATION; POLARIZATION; CRYSTALS;
D O I：
10.1364/OL.42.000041
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose a topological beam-shaping strategy of tera-hertz (THz) beams using geometric phase elements made of space-variant birefringent slabs. Quasi-monochromatic THz vortex beams are produced and characterized both in amplitude and phase from the reconstructed realtime two-dimensional imaging of the electric field. Nonseparable superpositions of such vortex beams are also obtained and characterized by two-dimensional polarimetric analysis. These results emphasize the versatility of the spin-orbit electromagnetic toolbox to prepare on-demand structured light endowed with polarization-controlled orbital angular momentum content in the THz domain, which should find many uses in future THz technologies. (C) 2016 Optical Society of America.
引用
收藏
页码：41 / 44
页数：4
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