Rapid tilted-plane Gerchberg-Saxton algorithm for holographic optical tweezers

• Published in: Optics express Vol. 28; no. 9; p. 12729
• Main Authors: Cai, Yanan, Yan, Shaohui, Wang, Zhaojun, Li, Runze, Liang, Yansheng, Zhou, Yuan, Li, Xing, Yu, Xianghua, Lei, Ming, Yao, Baoli
• Format: Journal Article
• Language: English
• Published: United States 27.04.2020
• ISSN: 1094-4087; 1094-4087
• DOI: 10.1364/OE.389897

Benefitting from the development of commercial spatial light modulator (SLM), holographic optical tweezers (HOT) have emerged as a powerful tool for life science, material science and particle physics. The calculation of computer-generated holograms (CGH) for generating multi-focus arrays plays a key role in HOT for trapping of a bunch of particles in parallel. To realize dynamic 3D manipulation, we propose a new tilted-plane GS algorithm for fast generation of multiple foci. The multi-focal spots with a uniformity of 99% can be generated in a tilted plane. The computation time for a CGH with 512×512 pixels is less than 0.1 second. We demonstrated the power of the algorithm by simultaneously trapping and rotating silica beads with a 7×7 spots array in three dimensions. The presented algorithm is expected as a powerful kernel of HOT.