Partially coherent beam generation with metasurfaces  

作　　者：ROMAN CALPE ATRI HALDER MEILAN LUO MATIAS KOIVUROVA JARI TURUNEN 

机构地区：[1]Center for Photonics Sciences,University of Eastern Finland,FI-80101 Joensuu,Finland [2]Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications,Hunan Normal University,Changsha 410081,China [3]Tampere Institute for Advanced Study,Tampere University,33100 Tampere,Finland [4]Faculty of Engineering and Natural Sciences,Tampere University,FI-33720 Tampere,Finland

出　　处：《Photonics Research》2023年第9期1535-1541,共7页光子学研究（英文版）

基　　金：China Scholarship Council;Natural Science Foundation of Hunan Province(2023JJ30383);National Natural Science Foundation of China(61805080);Ita-Suomen Yliopisto;Academy of Finland(320165,320166,333938)。

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.

关 键 词：COHERENT PERIODIC QUASI 

分 类 号：O43[机械工程—光学工程]