Photonics Research, 2023, 11 (9): 1535, Published Online: Aug. 28, 2023  

Partially coherent beam generation with metasurfaces

Author Affiliations
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
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.

Roman Calpe, Atri Halder, Meilan Luo, Matias Koivurova, Jari Turunen. Partially coherent beam generation with metasurfaces[J]. Photonics Research, 2023, 11(9): 1535.

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