Quantitative refractive index analysis of thermal and non-thermal curing of polymeric holographic material
Issued Date
2025-01-01
Resource Type
ISSN
0277786X
eISSN
1996756X
Scopus ID
2-s2.0-85219579441
Journal Title
Proceedings of SPIE - The International Society for Optical Engineering
Volume
13518
Rights Holder(s)
SCOPUS
Bibliographic Citation
Proceedings of SPIE - The International Society for Optical Engineering Vol.13518 (2025)
Suggested Citation
Oo P.S., Waritanant T. Quantitative refractive index analysis of thermal and non-thermal curing of polymeric holographic material. Proceedings of SPIE - The International Society for Optical Engineering Vol.13518 (2025). doi:10.1117/12.3058633 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/106641
Title
Quantitative refractive index analysis of thermal and non-thermal curing of polymeric holographic material
Author(s)
Author's Affiliation
Corresponding Author(s)
Other Contributor(s)
Abstract
Recent volume holographic recording materials commonly include a thermal curing step. There are attempts to directly cure liquid resin into a grating with lower success. This study explores the use of a viscous dimethacrylate resin as a holographic recording material synthesized both with and without thermal polymerization. We conducted a quantitative analysis of the refractive index modulation (Δn) in these materials utilizing two distinct holographic setups. The non-thermally polymerized films exhibited a lower Δn value of 0.27×10-3, which continued to increase with rising photoinitiator concentrations as the polymer matrix remained incompletely formed. Additionally, we observed distinct trends in Δn evolution with respect to exposure time and photoinitiator concentration. These findings emphasize the notable differences in Δn behavior between thermally and non-thermally polymerized materials, suggesting that the latter shows potential for further optimization by mitigating diffusion and stability effects.