Optic diffusers based on photopolymerizable hologram material with an ionic liquid as additive

Lin, Hechun; Oliveira, Peter William de; Veith, Michael; Gros, Michael; Grobelsek, Ingrid

doi:10.1364/ol.34.001150

Cited by 11 publications

(7 citation statements)

References 16 publications

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“…As a starting point for the materials’ preparation, we have chosen one of the compositions described in [24,32,33] for which the highest diffraction efficiency was obtained.…”

Section: Methodsmentioning

confidence: 99%

“…Lin et al investigated the influence of different ILs based on dialkylimidazolium as additives to poly(ethylene glycol)dimethacrylate [24,32,33]. They reported a significant improvement in the sensitivity, resolution and diffraction efficiency (from 1% in the absence of IL and a polymer binder to 34%) of holographic gratings with certain additives at certain compositions of a thin film (10

sans-serifμ normalm

).…”

Section: Introductionmentioning

confidence: 99%

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A Comprehensive Study of Photorefractive Properties in Poly(ethylene glycol) Dimethacrylate— Ionic Liquid Composites

et al. 2016

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A detailed investigation of the recording, as well as the readout of transmission gratings in composites of poly(ethylene glycol) dimethacrylate (PEGDMA) and ionic liquids is presented. Gratings with a period of about 5.8 micrometers were recorded using a two-wave mixing technique with a coherent laser beam of a 355-nm wavelength. A series of samples with grating thicknesses d0=10…150 micrometers, each for two different exposure times, was prepared. The recording kinetics, as well as the post-exposure properties of the gratings were monitored by diffracting a low intensity probe beam at a wavelength of 633 nm for Bragg incidence. To obtain a complete characterization, two-beam coupling experiments were conducted to clarify the type and the strength of the recorded gratings. Finally, the diffraction efficiency was measured as a function of the readout angle at different post-exposure times. We found that, depending on the parameters, different grating types (pure phase and/or mixed) are generated, and at elevated thicknesses, strong light-induced scattering develops. The measured angular dependence of the diffraction efficiency can be fitted using a five-wave coupling theory assuming an attenuation of the gratings along the thickness. For grating thicknesses larger than 85 microns, light-induced scattering becomes increasingly important. The latter is an obstacle for recording thicker holograms, as it destroys the recording interference pattern with increasing sample depth. The obtained results are valuable in particular when considering PEGDMA-ionic liquid composites in the synthesis of advanced polymer composites for applications, such as biomaterials, conductive polymers and holographic storage materials.

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“…As a starting point for the materials’ preparation, we have chosen one of the compositions described in [24,32,33] for which the highest diffraction efficiency was obtained.…”

Section: Methodsmentioning

confidence: 99%

sans-serifμ normalm

).…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Study of Photorefractive Properties in Poly(ethylene glycol) Dimethacrylate— Ionic Liquid Composites

et al. 2016

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“…The strong diffusion mechanism which follows the light exposure, enhanced by the presence of IL, allowed to reach diffraction efficiencies up to 34% for a thin hologram (Raman-Nath regime, 21 10 lm grating thickness). Holographic materials incorporating IL have also been used in the development of optical diffusers 22 as the concentration of IL can be varied to regulate their light diffusion property.…”

Section: Introductionmentioning

confidence: 99%

Photopolymerizable glasses incorporating high refractive index species and ionic liquid: A comparative study

Velasco

Hernández‐Garay

Calvo

et al. 2011

Journal of Applied Physics

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Three different holographic photomaterials belonging to the class of photopolymerizable glasses have been synthesized using sol-gel techniques, and characterized with the purpose of a comparative study. Their behavior is analyzed in terms of achieved refractive index modulation, dark diffusion mechanism, diffraction efficiency and optical quality; in order to determine their suitability for different holographic applications.

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“…8 Additionally, the incorporation of IL results in a controllable light scattering which has been applied to optical diffusers. 9 With the objective of studying the effects of incorporating ionic liquid to photopolymerizable glasses, three different photomaterials were synthesized and characterized by implementing transmission volume holographic diffraction gratings: the previously disclosed photopolymerizable glass incorporating HRIS, synthesized again for comparative purposes; and two photopolymerizable glasses incorporating a specific type of ionic liquid (with and without HRIS respectively).…”

Section: Introductionmentioning

confidence: 99%

Study of holographic diffraction gratings implemented in photopolymerizable glasses incorporating ionic liquid

et al. 2011

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In this work we analyze the optical quality, performance, and recording mechanism of holographic diffraction gratings recorded in photopolymerizable sol-gel glasses. These classes of holographic photomaterials have various compositions, one of which incorporates a High Refractive Index Species (HRIS), already developed in our group GICO-UCM. The new types of photopolymerizable glasses under study incorporate ionic liquid (IL). We present a comparative study, showing distinctive behaviors for each photopolymerizable glass class, and determining particular features for various ranges of applications.

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Optic diffusers based on photopolymerizable hologram material with an ionic liquid as additive

Cited by 11 publications

References 16 publications

A Comprehensive Study of Photorefractive Properties in Poly(ethylene glycol) Dimethacrylate— Ionic Liquid Composites

A Comprehensive Study of Photorefractive Properties in Poly(ethylene glycol) Dimethacrylate— Ionic Liquid Composites

Photopolymerizable glasses incorporating high refractive index species and ionic liquid: A comparative study

Study of holographic diffraction gratings implemented in photopolymerizable glasses incorporating ionic liquid

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