Two-photon recording of microholograms in photopolymer materials with new cationic thioxanthone photoinitiators |
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Authors: | Ilya Sh Steinberg Vladimir A Loskutov Yuri A Shepetkin |
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Institution: | a Institute of Automation and Electrometry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia b Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia |
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Abstract: | We have demonstrated two-photon induced recording of the microholograms at an arbitrary point within thick (∼100 μm) photopolymer material using photoinitiators on a basis of new cationic thioxanthone derivatives. Such material provides high values of refractive index change Δn = 4.8 × 10−3, and holographic recording sensitivity S = 1.2 cm/J. A nanosecond laser pulse at a wavelength of 532 nm was used for recording. For the selective on the depth reading of the microholograms the method of collinear heterodyning was applied. |
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Keywords: | 42 40 Ht 42 50 Hz 42 70 Ln 42 70 Jk |
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