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13 March 2024 Measuring Bragg selectivity in soft holographic materials under strain
Andrew N. Sias, Robert R. McLeod, Marianela Trujillo-Lemon, Christopher N. Bowman
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Proceedings Volume PC12910, Practical Holography XXXVIII: Displays, Materials, and Applications; PC1291007 (2024) https://doi.org/10.1117/12.3009012
Event: SPIE OPTO, 2024, San Francisco, California, United States
Abstract
The Bragg selectivity of a volume hologram is a crucial characterization metric, but distorted Bragg selectivity curves obtained from holograms in soft media cannot be evaluated by existing analysis techniques. We demonstrate that distorted Bragg curves arise from mechanical strain within the polymer network, causing non-uniform distortion of the grating fringe spacing. We then present a method for obtaining spatially resolved Bragg selectivity curves and for evaluating the local and global hologram fidelity.
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Andrew N. Sias, Robert R. McLeod, Marianela Trujillo-Lemon, and Christopher N. Bowman "Measuring Bragg selectivity in soft holographic materials under strain", Proc. SPIE PC12910, Practical Holography XXXVIII: Displays, Materials, and Applications, PC1291007 (13 March 2024); https://doi.org/10.1117/12.3009012
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KEYWORDS
Holograms
Distortion
Holographic materials
Holography
Polymerization
Shrinkage
Volume holography
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