Partially coherent beam generation with metasurfaces

被引:1
|
作者
Calpe, Roman [1 ]
Halder, Atri [1 ]
Luo, Meilan [1 ,2 ,3 ]
Koivurova, Matias [4 ,5 ]
Turunen, Jari [1 ]
机构
[1] Univ Eastern Finland, Ctr Photon Sci, FI-80101 Joensuu, Finland
[2] Hunan Normal Univ, Dept Phys, Changsha 410081, Peoples R China
[3] Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat, Changsha 410081, Peoples R China
[4] Tampere Univ, Tampere Inst Adv Study, Tampere 33100, Finland
[5] Tampere Univ, Fac Engn & Nat Sci, FI-33720 Tampere, Finland
基金
中国国家自然科学基金; 芬兰科学院;
关键词
DIFFRACTIVE ELEMENTS; PROPAGATION; PARAMETERS;
D O I
10.1364/PRJ.492233
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
An optical system for the generation of partially coherent beams with genuine cross-spectral density functions from spatially modulated globally incoherent sources is presented. The spatial intensity modulation of the incoherent source is achieved by quasi-planar metasurfaces based on spatial-frequency modulation of binary Bragg surface-relief diffraction gratings. Two types of beams are demonstrated experimentally: (i) azimuthally periodic, radially quasi-periodic beams and (ii) rotationally symmetric Bessel-correlated beams with annular far-zone radiation patterns.
引用
收藏
页码:1535 / 1541
页数:7
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