Xinyu Gui, Ze Cai, Chaowei Wang, Leran Zhang, Yanlei Hu, Dong Wu. Femtosecond Laser Dynamic Holography for Efficient Preparation of Three-Dimensional Multi-Petal Structures[J]. Chinese Journal of Lasers, 2025, 52(8): 0802401

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- Chinese Journal of Lasers
- Vol. 52, Issue 8, 0802401 (2025)

Fig. 1. Schematic diagram of femtosecond laser holographic processing system

Fig. 2. Schematic diagram of holographic light field calculation and generation process

Fig. 3. LCoS-SLM wavefront distortion and correction. (a) Schematic diagram of reflected wavefront distortion caused by micron-scale deformation of LCoS-SLM backplane; (b) compensated phase hologram corresponding to 800 nm wavelength

Fig. 4. Schematics of dynamic holographic processing. (a) Dynamic processing through hologram rotation; (b) holograms under different rotation angles; (c) measured optical field distributions under objective lens when hologram rotates at different angles

Fig. 5. Dynamic holographic processing of multi-petal structures. (a) Regulation of opening size of bowl-like structure by adjusting rotation angle; (b) formation of multi-petal flower-like structure; (c) SEM image of multi-petal flower-like structure

Fig. 6. Opening and closing of micro-flower structure controlled by liquid. (a) Micro-flowers opening in liquid; (b) closed micro-flowers after solution is dried; fluorescence images of word “FLOWER” consisting of (c) open and (d) closed micro-flowers, with enlarged fluorescence images on right

Fig. 7. Schematics of dynamic holographic composite processing (a) Hologram rotation motion synergized with displacement stage parallel motion; (b) holograms under different rotation angles

Fig. 8. Compound motion processing demonstrations. (a) Fabrication of micro-spring structures with different pitches by combining rotational dynamic holography with linear motion; (b) fabrication of circular multi-petal structures with different diameters by combining rotational dynamic holography with circular motion; (c) circular multi-petal structures with different diameter periods; (d) fluorescence pattern of concentric circular multi-petal structures with periodic change trend opposite to that of Fig. 8(c)

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