Improvement of the spatial frequency response of photopolymer materials by modifying polymer chain length

Gleeson, Michael R.; Sabol, Dušan; Shui, Lingling; Close, Ciara E.; Kelly, John V.; Sheridan, John T.

doi:10.1364/josab.25.000396

Cited by 70 publications

(206 citation statements)

References 27 publications

Supporting

Mentioning

190

Contrasting

Order By: Relevance

“…It has also been reported [2][3][4]7,8 that some of the free radicals produced, see Eq. ͑9͒, can be scavenged by reacting with inhibitor molecules to produce inactive or dead molecules, i.e., ED dead .…”

Section: Photoinitiation Mechanism Analysismentioning

confidence: 76%

“…where I 0 Ј ͑Einstein/ cm 2 s͒ is the incident intensity corrected by the transmission fraction T sf , 8,14 d is the thickness of the photopolymer material layer. The fraction ⌿ differentiates between the concentration of 1 Dye * molecules generated and the concentration of the more stable ͑longer-lived͒ triplet state molecules, 3 Dye * , simultaneously generated.…”

Section: Photoinitiation Mechanism Analysismentioning

confidence: 99%

“…Since the primary radicals are generated in pairs, [2][3][4][5][6][7][8]16 the rate equation governing ͓ED͔ can be presented in the same fashion,…”

Section: Photoinitiation Mechanism Analysismentioning

confidence: 99%

“…1, experiments were carried out to characterize the recovery and bleaching processes of two types of photosensitive dye, i.e., MB and EB, in a PVA/AA layer. [1][2][3][4][5][6][7][8] In order to demonstrate the advantages and improvements arising from the use of the developed model presented here, it is applied to almost identical experimental data to that examined in Ref. 1 for MB and EB.…”

Section: Experimental Validationmentioning

confidence: 99%

“…[1][2][3][4] The resulting models attempt to take account of the effects of ͑i͒ the photon absorption, ͑ii͒ the regeneration or recovery of absorptive photosensitizer, and ͑iii͒ photosensitizer bleaching. In this paper, the photoinitiation mechanisms involved during holographic recording in a polyvinyl alcohol/acrylamide ͑PVA/AA͒ based photopolymer [5][6][7][8][9][10][11] is studied. The aim is to precisely predict the number of photons that are absorbed by the photosensitizer, which result in the generation of primary radicals, ED · ͑or R · ͒.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Extended model of the photoinitiation mechanisms in photopolymer materials

Shui

Gleeson

Sabol

et al. 2009

Journal of Applied Physics

Self Cite

View full text Add to dashboard Cite

In order to further improve photopolymer materials for applications such as data storage, a deeper understanding of the photochemical mechanisms which are present during the formation of holographic gratings has become ever more crucial. This is especially true of the photoinitiation processes, since holographic data storage requires multiple sequential short exposures. Previously, models describing the temporal variation in the photosensitizer (dye) concentration as a function of exposure have been presented and applied to two different types of photosensitizer, i.e., Methylene Blue and Erythrosine B, in a polyvinyl alcohol/acrylamide based photopolymer. These models include the effects of photosensitizer recovery and bleaching under certain limiting conditions. In this paper, based on a detailed study of the photochemical reactions, the previous models are further developed to more physically represent these effects. This enables a more accurate description of the time varying dye absorption, recovery, and bleaching, and therefore of the generation of primary radicals in photopolymers containing such dyes.

show abstract