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Barille R, Korbut A, Zielinska S, Ortyl E, Perez DG. Laser beam shaping using a photoinduced azopolymer droplet-based mask. Appl Opt 2024; 63:990-998. [PMID: 38437396 DOI: 10.1364/ao.510715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 01/02/2024] [Indexed: 03/06/2024]
Abstract
The dewetting of an azopolymer droplet, followed by the photostructuration of the evaporated droplet, is employed to create an amplitude mask. This straightforward process yields a large area featuring periodic micro- and nanostructures. The resulting pattern is utilized to generate a nondiffracting beam. Starting with a Gaussian beam illuminating the amplitude mask, the critical aspect is the production of a bright, ring-shaped beam with a high radius-to-width ratio and symmetric central laser spots, each with the same intensity. This alternative approach to shaping a laser beam is demonstrated as a rapid and cost-effective fabrication technique.
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Gharbi S, Ly A, Dhahri E, Barille R, Lahem D, Debliquy M, Rguiti M. Influence of calcium substitution on structural, morphological and electrical conductivity properties of La1- xCaxNi0.5Ti0.5O3 (x=0.0, x=0.2) compounds for energy storage devices. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Moussi R, Bougoffa A, Trabelsi A, Dhahri E, Graça M, Valente M, Barille R, Rguiti M. Investigation of the effect of Sr-substitution on the structural, morphological, dielectric, and energy storage properties of BaTiO3-based perovskite ceramics. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109225] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Benameur K, Mouchaal Y, Benchouk K, Laafer A, Barille R. Synthesized and characterizations nanoparticles of chalcopyrite alloy CuIn1-xFexSe2. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2021.109165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Sorkhabi SG, Ahmadi-Kandjani S, Cousseau F, Dabos-Seignon S, Loumaigne M, Ortyl E, Zielinska S, Barille R. Topological reconstruction of a stretched transparent surface relief grating via an optical diffraction pattern. Appl Opt 2021; 60:5236-5244. [PMID: 34143093 DOI: 10.1364/ao.424845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 05/17/2021] [Indexed: 06/12/2023]
Abstract
The optical characterization of transparent and stretchable patterned surfaces replicated from the fabrication of quasicrystal structures on azopolymer thin films is presented. The complexity of the quasicrystal surface fabrication is obtained by superimposed multiple light exposures. Azopolymer surface patterns are used as a replica molding master. The microscopic elongation of nanocavities induced by macroscopic stretchings of the elastomeric quasicrystal replication is characterized via optical diffraction. An original numerical method is presented to reconstruct the structured surface deduced from the optical diffraction measurements. The measurements show that drastic topologic changes, e.g., going from cavities to a canal, happens on the surface. This could be ingeniously used for creating actionable structured surfaces or nanoparticles trapping surfaces.
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Dkhilalli F, Megdiche Borchani S, Rasheed M, Barille R, Shihab S, Guidara K, Megdiche M. Characterizations and morphology of sodium tungstate particles. R Soc Open Sci 2018; 5:172214. [PMID: 30224991 PMCID: PMC6124057 DOI: 10.1098/rsos.172214] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 07/05/2018] [Indexed: 06/08/2023]
Abstract
A solid-state reaction technique was used to synthesize polycrystalline Na2WO4. Preliminary X-ray studies revealed that the compound has a cubic structure at room temperature. The formation of the compound has been confirmed by X-ray powder diffraction studies and Raman spectroscopy. Electrical and dielectric properties of the compound have been studied using complex impedance spectroscopy in the frequency range 209 Hz-1 MHz and temperature range 586-679 K. The impedance data were modellized by an equivalent circuit consisting of series of a combination of grains and grains boundary. We use complex electrical modulus M* at various temperatures to analyse dielectric data. The modulus plots are characterized by the presence of two relaxation peaks thermally activated. The morphologies and the average particle size of the resultant sodium tungstate sample were demonstrated by atomic force microscopy, scanning electron microscopy and transmission electron microscopy. The thicknesses and optical constants of the sample have been calculated using ellipsometric measurements in the range of 200-22 000 nm by means of new amorphous dispersion formula which is the objective of the present work. The results were obtained for Na2WO4 particles from experimental (EXP) and measured (FIT) data showed an excellent agreement. In addition, the energy gap of the Na2WO4 sample has been determined using ellipsometry and confirmed by spectrophotometry measurements.
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Affiliation(s)
- F. Dkhilalli
- Faculty of Sciences, Laboratory of Spectroscopic Characterization and Optical Materials, University of Sfax, BP 1171, 3000 Sfax, Tunisia
- MOLTECH-Anjou, University of Angers/UMR CNRS 6200, 2 Boulevard Lavoisier, 49045 Angers, France
| | - S. Megdiche Borchani
- Faculty of Sciences, Laboratory of Spectroscopic Characterization and Optical Materials, University of Sfax, BP 1171, 3000 Sfax, Tunisia
- Higher Institute of Computing and Multimedia of Sfax (ISIMS), Technological Center of Sfax, BP 242, SakietEzzit, 3021 Sfax, Tunisia
| | - M. Rasheed
- MOLTECH-Anjou, University of Angers/UMR CNRS 6200, 2 Boulevard Lavoisier, 49045 Angers, France
| | - R. Barille
- MOLTECH-Anjou, University of Angers/UMR CNRS 6200, 2 Boulevard Lavoisier, 49045 Angers, France
| | - S. Shihab
- Department of Applied Sciences, University of Technology, Baghdad, Iraq
| | - K. Guidara
- Faculty of Sciences, Laboratory of Spectroscopic Characterization and Optical Materials, University of Sfax, BP 1171, 3000 Sfax, Tunisia
| | - M. Megdiche
- Faculty of Sciences, Laboratory of Spectroscopic Characterization and Optical Materials, University of Sfax, BP 1171, 3000 Sfax, Tunisia
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Kandjani SA, Barille R, Dabos-Seignon S, Nunzi JM, Ortyl E, Kucharski S. Incoherent light-induced self-organization of molecules. Opt Lett 2005; 30:3177-9. [PMID: 16342712 DOI: 10.1364/ol.30.003177] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Although coherent light is usually required for the self-organization of regular spatial patterns from optical beams, we show that peculiar light-matter interaction can break this evidence. In the traditional method of recording laser-induced periodic surface structures, a light intensity distribution is produced at the surface of a polymer film by an interference between two coherent optical beams. We report on the self-organization followed by propagation of a surface relief pattern. It is induced in a polymer film by using a low-power and small-size coherent beam assisted by a high-power and large-size incoherent and unpolarized beam. We demonstrate that we can obtain large size and well-organized patterns starting from a dissipative interaction. Our experiments open new directions to improving optical processing systems.
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Kandjani SA, Barille R, Dabos-Seignon S, Nunzi JM, Ortyl E, Kucharski S. Multistate polarization addressing using a single beam in an azo polymer film. Opt Lett 2005; 30:1986-8. [PMID: 16092241 DOI: 10.1364/ol.30.001986] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Peculiar light-matter interactions can break the rule that a single beam polarization can address only two states in an optical memory device. Multistate storage of a single beam polarization is achieved using self-induced surface diffraction gratings in a photoactive polymer material. The grating orientation follows the incident light beam's polarization direction. The permanent self-induced surface relief grating can be read out in real time using the same laser beam.
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Affiliation(s)
- S Ahmadi Kandjani
- Laboratoire POMA, UMR 6136-Université d'Angers 2, Boulevard Lavoisier, 49045 Angers, France
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Barille R, Wang D, Dorkenoo KD, Rivoire G. Relation entre la modulation de fréquance et la diffusion de Rayleigh stimulée à large bande spectrale dans CS2. ACTA ACUST UNITED AC 2004. [DOI: 10.1051/anphys:199556040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Barille R, Canioni L, Sarger L, Rivoire G. Nonlinearity measurements of thin films by third-harmonic-generation microscopy. Phys Rev E Stat Nonlin Soft Matter Phys 2002; 66:067602. [PMID: 12513450 DOI: 10.1103/physreve.66.067602] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2002] [Revised: 07/22/2002] [Indexed: 11/07/2022]
Abstract
We show that the electronic part of the nonlinear susceptibility chi(3) of thin films can be easily measured by third harmonic microscopy. The phenomenon of third harmonic generation (THG) is excited by a femtosecond laser beam focused at the interface between the thin film and a reference layer. The value of chi(3) is deduced from the THG intensity measurements with the help of a classical model. The validity of this simple and alternative method is established by testing reference liquid films.
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Affiliation(s)
- R Barille
- Laboratoire des Propriétés Optiques des Matériaux et Applications/CNRS-Université d'Angers, 4, Boulevard Lavoisier, Boîte Postale 2018, France.
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Barille R, Canioni L, Rivet S, Sarger L, Brechet F, Roy P, Pagnoux D. Nondestructive analysis of the transverse structure of novel optical fibers by third-harmonic-generation microscopy. Opt Lett 2002; 27:1391-1393. [PMID: 18026456 DOI: 10.1364/ol.27.001391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We demonstrate the suitability of the third-harmonic-generation technique as a new nonlinear microprobe for nondestructive determination of the index profile of optical fibers. Photonic bandgap (Bragg-type) and air-silica microstructure (ASM) fibers were tested. The complete spatial characteristics, such as hole diameter and spacing into ASM fibers or sandwiched layer thickness into Bragg fibers, were demonstrated to be attainable anywhere along a bare fiber.
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Canioni L, Rivet S, Sarger L, Barille R, Vacher P, Voisin P. Imaging of Ca(2)+ intracellular dynamics with a third-harmonic generation microscope. Opt Lett 2001; 26:515-7. [PMID: 18040370 DOI: 10.1364/ol.26.000515] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We describe the promising development of third-harmonic generation (THG) in laser scanning microscopy for study of the functional imaging of live biological cells. The dynamics of Ca(2+) in biological cells is shown. The Ca(2+) signal consists of a transient increase in the intracellular concentration. THG microscopy allows one to temporally visualize the release of Ca(2+) from internal stores and (or) calcium influx.
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