Diqin Zhang, Yu Zhao, Zhen Zhang, Jianhua Zhu, Yuxia Zhao. Synthesis and Properties of Photosensitizer for Green-Sensitive Holographic Recording Medium[J]. Acta Optica Sinica, 2022, 42(2): 0209001
- Acta Optica Sinica
- Vol. 42, Issue 2, 0209001 (2022)
Fig. 1. Molecular structural formula of green-sensitive cyclopentanone photosensitizer
Fig. 2. Fabrication process of holographic photopolymer samples
Fig. 3. Optical path of holographic test. (a) Test of exposure characteristics; (b) test of angle selectivity of Bragg grating; (c) reconstruction of hologram
Fig. 4. Photophysical and photochemical properties of photosensitizer in DMF solution. (a) Normalized UV-VIS absorption spectra; (b) UV-VIS absorption intensity of photosensitizer under 532 nm laser irradiation varies with light time
Fig. 5. Photopolymerization kinetics of prepolymer solution containing 0.02% photosensitizer under 532 nm laser irradiation. (a) Curves of carbon-carbon double bond conversion rate with time; (b) curves of monomer polymerization rate with time
Fig. 6. Holographic exposure characteristic curves of samples containing 0.02% photosensitizer under interference exposure of 532 nm laser
Fig. 7. Relationship between diffraction efficiency and exposure of samples containing BTMI under 532 nm monopulse laser exposure
Fig. 8. Original image and hologram reconstruction image recorded by sample containing BTMI. (a) Dot diameter is 100 μm; (b) dot diameter is 30 μm
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Table 1. Photophysical properties of photosensitizers in DMF solution
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Table 2. Holographic properties of samples containing 0.02% photosensitizer at different spatial frequencies
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