Photopolymerizable nanocomposites for holographic recording and sensor application

Leite, Ema Sacadura; Naydenova, Izabela; Mintova, Svetlana; Leclercq, Louis; Toal, Vincent

doi:10.1364/ao.49.003652

Cited by 80 publications

(50 citation statements)

References 29 publications

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“…They can function as gratings, lenses, beam splitters, spectral filters, shear elements, achromats, mirrors, birefringent elements, and multi-function elements. They can be used, for example, in optical sensors [1][2][3][4][5][6][7], fibre-optics [8][9][10][11], optical scanners [12][13][14], optical disk pick-up heads [15][16] as well as holographic concentrators [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Using acrylamide-based photopolymers for fabrication of holographic optical elements in solar energy applications

Akbari¹,

Naydenova²,

Martin³

2014

Appl. Opt.

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A holographic device is under development that aims to improve light collection in solar cells. The aim is to explore the potential of using photopolymer Holographic Optical Elements (HOE) to collect light from a moving source, such as the sun, and re-direct it for concentration by a holographic lens.. A working range of 45 degrees is targeted for such a device to be useful in solar applications without tracking. A photopolymer HOE is capable of efficiently re-directing light, but the angular selectivity of a single grating is usually of the order of one degree at the thicknesses required for high efficiency. The challenge here is to increase the angular and wavelength range of the gratings so that a reasonable number may be multiplexed and/or combined to provide a device that can concentrate light incident from a large range of angles. In this paper low spatial frequency holographic recording is explored in order to increase the angular and wavelength range of an individual grating. Ultimately, a combination of gratings will be used so that a broad range of angles of incidence are accepted. A design is proposed for the combination of such elements into a holographic solar collector. The first step in achieving this is optimization of recording at low spatial frequency. This requires a photopolymer material with unique properties, such as a fast monomer diffusion rate. This paper reports results on the efficiency of holograms recorded in an acrylamide based photopolymer at low spatial frequencies (100, 200 and 300 l/mm). The diffraction efficiency and angular selectivity of recorded holograms have been studied for various photopolymer layer thicknesses and different intensities of the recording beams. A diffraction efficiency of over 80% was achieved at a spatial frequency of 200 l/mm. The optimum intensity of recording at this spatial frequency was found to be 1 mW/cm 2 . Individual gratings and focusing elements with high efficiency and FWHM angles of 3 o are experimentally demonstrated.

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Section: Introductionmentioning

confidence: 99%

Using acrylamide-based photopolymers for fabrication of holographic optical elements in solar energy applications

Akbari¹,

Naydenova²,

Martin³

2014

Appl. Opt.

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“…14). If the nanoparticles are redistributed in the dark fringe areas, as it has been observed for MFI, BEA and AEI doped photopolymers [79][80][81], exposure of the grating to the analyte will lead to a decrease of the diffracted beam intensity.…”

Section: Holographic Sensor Based On Transmission Holographic Gratingmentioning

confidence: 85%

“…The first type of sensor can be designed to operate in transmission or reflection mode, while the second requires operation in reflection mode. Examples of sensors based on transmission holograms have been recently reported [79,80]. Transmission holograms recorded in zeolite Beta doped photopolymer have been used for the fabrication of holographic sensors.…”

Section: Holographic Sensors Recorded In Zeolite-doped Photopolymersmentioning

confidence: 99%

“…Transmission holograms recorded in zeolite Beta doped photopolymer have been used for the fabrication of holographic sensors. It has been demonstrated that the addition of 5 wt.% zeolite Beta to the polymer layers yields to an increase of the transmission grating sensitivity towards toluene in comparison to the undoped photopolymer [79]. The optical properties of AEI-doped photopolymer layers combined with the redistribution of the AEI nanoparticles during holographic recording have been exploited for fabrication of an irreversible humidity sensor based on a transmission holographic grating.…”

Section: Holographic Sensors Recorded In Zeolite-doped Photopolymersmentioning

confidence: 99%

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Progress in zeolite synthesis promotes advanced applications

Zaarour

Dong

Naydenova³

et al. 2014

Microporous and Mesoporous Materials

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160

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a b s t r a c tThis article outlines the importance of zeolite synthesis and their unique physicochemical characteristics promoting advanced applications. The main strategies for preparation of zeolites including organic-template assisted, organic-template free and alternative procedures are considered for synthesis of crystallites offering control and fine-tuning of their properties. Besides, rational design of zeolites with pre-determined structure, porosity, size, morphology, and composition are more viable by studying carefully the chemical and physical parameters controlling the zeolite synthesis and understanding the crystallization mechanism. Finally, a particular attention to the preparation of zeolites with nanosized dimensions and their utilization in innovative applications including photovoltaic, medicine and holographic sensors are presented.

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“…or sensors (Leite et al 2010;Whalley et al 2001). In fact, in addition to attractive chemical surface properties, high surface areas and specific pore systems are often required to enhance solid properties.…”

Section: ) Drug Hostsmentioning

confidence: 99%

Multilayer adsorption equilibrium model for gas adsorption on solids

Thomas

Schaetzel

2012

Adsorption

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Adaptation of the ENSIC model to physisorption of nitrogen or argon on a solid surface first led to a 3 parameters model called multilayer adsorption equilibrium model (MAE model). One of these parameters is related to the formation of a multilayer of adsorbate on the solid surface. Exploitation of data from the literature pointed out that this parameter does not depend on the nature of the solid surface and an average value was calculated in the case of N 2 and Ar. As a consequence, the MAE model can be considered as a 2 parameters model. Linearization of the model was established allowing an easy determination of surface areas of macroporous and some mesoporous solids. Fitting of isotherms of meso and macroporous solids has led to promising results compared to the ones obtained with the BET model. Moreover, adaptation of this model to microporous solids can also be used for an uncomplicated determination of porous volume and external surface. Results obtained from data of the literature were close to those obtained with the t-plot model.

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Photopolymerizable nanocomposites for holographic recording and sensor application

Cited by 80 publications

References 29 publications

Using acrylamide-based photopolymers for fabrication of holographic optical elements in solar energy applications

Using acrylamide-based photopolymers for fabrication of holographic optical elements in solar energy applications

Progress in zeolite synthesis promotes advanced applications

Multilayer adsorption equilibrium model for gas adsorption on solids

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