Photopolymerization-enforced stratification in liquid crystal materials

Zhao, Wei; Haan, Laurens T. de; Broer, Dirk J.; Zhang, Yang; Lv, Pengrong; Zhou, Guofu

doi:10.1016/j.progpolymsci.2021.101365

Cited by 20 publications

(16 citation statements)

References 198 publications

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“…Polymer composites are widely used for fabrication of optical and photonic systems [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ]. In particular, they are exploited for the fabrication of holographic volume phase gratings [ 3 , 4 , 12 , 15 , 17 , 18 , 26 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

Light-Controlled Direction of Distributed Feedback Laser Emission by Photo-Mobile Polymer Films

et al. 2022

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We report on the realization of Distributed Feedback (DFB) lasing by a high-resolution reflection grating integrated in a Photomobile Polymer (PMP) film. The grating is recorded in a recently developed holographic mixture basically containing halolakanes/acrylates and a fluorescent dye molecule (Rhodamine 6G). The PMP-mixture is placed around the grating spot and a subsequent curing/photo-polymerization process is promoted by UV-irradiation. Such a process brings to the simultaneous formation of the PMP-film and the covalent link of the PMP-film to the DFB-grating area (PMP-DFB system). The PMP-DFB allows lasing action when optically pumped with a nano-pulsed green laser source. Moreover, under a low-power light-irradiation the PMP-DFB bends inducing a spatial readdressing of the DFB-laser emission. This device is the first example of a light-controlled direction of a DFB laser emission. It could represent a novel disruptive optical technology in many fields of Science, making feasible the approach to free standing and light-controllable lasers.

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Section: Introductionmentioning

confidence: 99%

Light-Controlled Direction of Distributed Feedback Laser Emission by Photo-Mobile Polymer Films

et al. 2022

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“…To tackle the above challenge, it is convincible to integrate the liquid crystal (LC) with photopolymers by holography considering the unique polarization-sensitivity of the LC. 22,[39][40][41][42][43] The LC is a soft matter in the mesophase between isotropic liquids and anisotropic crystals, which can show the unique anisotropic properties by the preferred molecular orientation and long-range molecular ordering. 22,30,39 In addition, the LC ordering can be switched by thermal or electric stimuli, 30,43 which may provide more security functions to the holographic 3D images.…”

Section: Introductionmentioning

confidence: 99%

Liquid crystal-assisted manufacturing of flexible holographic polymer nanocomposites for high-security level anticounterfeiting

Chen

Wei

Li³

et al. 2022

Mater. Chem. Front.

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“…For example, a photoinduced methodology with controlled radical polymerizations allowed the precise control of molecular weight (MW) and molecular weight distribution [ 6 , 7 , 8 ]. On the other hand, the nonliving radical polymerization is most widely used in various established and emerging applications, including coatings, inks, dentals, 3D printings, and microelectronics [ 9 , 10 , 11 , 12 , 13 , 14 ]. This kind of polymerization photopolymerization is generally classified into two pathways, (1) the free radical polymerization (FRP) [ 15 ] and (2) the cationic polymerization (CP) [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Naphthalene-Based Oxime Esters as Type I Photoinitiators for Free Radical Photopolymerization

et al. 2022

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In order to discuss the polymerization effect from the substituted position and methoxy group of Type I photinitiators, a series of naphthalene-based oxime esters was designed and synthesized. Compared to the 2-naphthalene-substituted compound, the UV absorption region of the 1-naphthalene-based compound was greatly improved. In addition, the methoxy substitution exhibited longer absorption characteristics than did the methoxy-free one. The photochemical reaction behavior of these novel compounds was also studied by photolysis, cyclic voltammetry (CV), and electron spin resonance (ESR) experiments. Finally, the initiation abilities of naphthalene-based oxime esters toward trimethylolpropane triacrylate (TMPTA) monomer were conducted through the photo-DSC instrument under UV and a 405@nm LED lamp. Remarkedly, the naphthalene-based oxime ester (NA-3) that contains 1-naphthalene with o-methoxy substituent showed the rather red-shifted absorption region with the highest final conversion efficiency under UV (46%) and 405@nm LED (41%) lamp irradiation.

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Photopolymerization-enforced stratification in liquid crystal materials

Cited by 20 publications

References 198 publications

Light-Controlled Direction of Distributed Feedback Laser Emission by Photo-Mobile Polymer Films

Light-Controlled Direction of Distributed Feedback Laser Emission by Photo-Mobile Polymer Films

Liquid crystal-assisted manufacturing of flexible holographic polymer nanocomposites for high-security level anticounterfeiting

Naphthalene-Based Oxime Esters as Type I Photoinitiators for Free Radical Photopolymerization

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