Three-dimensional spatial multi-point uniform light focusing through scattering media based on feedback wavefront shaping

doi:10.1088/1674-1056/abe3e6

Abstract We use feedback wavefront shaping technology to realize the multi-point uniform light focusing in three-dimensional (3D) space through scattering media only by loading the optimal mask once. General 3D spatial focusing needs to load the optimal mask multiple times to realize the spatial movement of the focal point and the uniformity of multi-point focusing cannot be guaranteed. First, we investigate the effects of speckle axial correlation and different axial distances on 3D spatial multi-point uniform focusing and propose possible solutions. Then we use our developed non-dominated sorting genetic algorithm suitable for 3D spatial focusing (S-NSGA) to verify the experiment of multi-point focusing in 3D space. This research is expected to have potential applications in the fields of optical manipulation and optogenetics.

Keywords: wavefront shaping speckle correlation 3D spatial focusing multi-point focusing

Received: 09 January 2021
Revised: 04 February 2021
Accepted manuscript online: 07 February 2021

PACS:	42.25.Dd	(Wave propagation in random media)
	42.25.Fx	(Diffraction and scattering)
	42.30.-d	(Imaging and optical processing)
	42.30.Ms	(Speckle and moiré patterns)

Fund: Project supported by the Natural Science Foundation of Beijing Municipality, China (Grant No. 7182091).

Corresponding Authors: ^†Corresponding author. E-mail: dingyc@mail.buct.edu.cn

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Fan Yang(杨帆), Yang Zhao(赵杨), Chengchao Xiang(向成超), Qi Feng(冯祺), and Yingchun Ding(丁迎春) Three-dimensional spatial multi-point uniform light focusing through scattering media based on feedback wavefront shaping 2021 Chin. Phys. B 30 044207

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Three-dimensional spatial multi-point uniform light focusing through scattering media based on feedback wavefront shaping

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