Search results for "Optical recording"

showing 8 items of 8 documents

Azobenzene Containing Low-Molecular Weight Organic Glasses for Optical Recording

2013

Abstract In this work photoinduced processes and holographic surface relief formation in azobenzene containing low- molecular weight organic glasses were studied. The molecular glasses due to trans-cis isomerisation and photo- orientation of molecules possess high sensitivity to the light irradiation and therefore they are promising media for holographic recording. Electric field of linearly polarized light causes an alignment of molecule dipoles perpendicularly to the electric field vector and this process is accompanied by an appearance of photoinduced optical anisotropy in organic glasses. The photoinduced birefringence and dichroism induced by 532 nm light was studied. Holographic recor…

BirefringenceMaterials scienceHolographic gratingbusiness.industryHolographyPhysics and Astronomy(all)DichroismPolarization (waves)Diffraction efficiencylaw.inventionchemistry.chemical_compoundAzobenzenechemistrylawOptical recordingdichroismsurface relief gratingorganic glassOptoelectronicsholographic recordingbusinessPhysics Procedia
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Storage of information in lithium niobate single crystals

2011

Reported studies of recording information were made with a number of LiNbO 3 compositions: stoichiometric and congruent single crystals. The present study shows that recording is possible in pure LiNbO 3 single crystals and in single crystals containing inactive cation dopants. Recording in stoichiometric crystals is likely possible because of a considerable amount of electrons localised in shallow traps. Absence of recorded information in pure congruent crystals were observed.

Crystallographychemistry.chemical_compoundOptical imagingMaterials scienceDopantchemistryOptical recordingLithium niobateNonlinear opticsIntegrated opticsElectronStoichiometry2011 International Symposium on Applications of Ferroelectrics (ISAF/PFM) and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials
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Preparation and Characterization of Tin Tungstate Thin Films

2015

Tin tungstate thin films were prepared by dc magnetron sputtering method and studied by x-ray diffraction, confocal microscopy and Raman spectroscopy. It is shown that the films are composed mainly of nanocrystalline α-SnWO4 phase. The possibility to use these films as write-once optical recording media is demonstrated.

DiffractionMaterials sciencebusiness.industrySputter depositionCondensed Matter PhysicsNanocrystalline materialElectronic Optical and Magnetic MaterialsCharacterization (materials science)symbols.namesakePhase (matter)Optical recordingsymbolsOptoelectronicsThin filmRaman spectroscopybusinessFerroelectrics
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Application of amorphous chalcogenide thin films in optical recording technologies

2005

A solid immersion holographic method for the recording of refractive-index and surface-relief modulated gratings with a period of 0.2 µm–1 µm in amorphous films of chalcogenide semiconductors As2S3 and As-S-Se has been developed and studied. The angular selectivity of holographic recording in amorphous chalcogenide thin films can be improved significantly by a decrease of grating period. The possibility to use the amorphous chalcogenide films as a media for holographic recording and storage of information with high density is discussed. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

Materials scienceChalcogenidebusiness.industryHolographyGratingAmorphous solidlaw.inventionchemistry.chemical_compoundOpticsSemiconductorchemistrylawOptical recordingOptoelectronicsThin filmbusinessHolographic recordingphysica status solidi (c)
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<title>Application of amorphous chalcogenide thin films in optical recording technologies</title>

2005

A review of the recent advances and developments in the practical application of amorphous chalcogenide materials is presented, focusing special attention to holography and lithography. The main functional principles and practical application of amorphous chalcogenide photoresists for production of the embossed rainbow holograms and holographic optical elements are discussed. The laser interference lithography can be used as a low-cost method for the exposure of large surfaces with regular patterns like subwavelength-gratings and microsieves. The surface-relief and reftactive-index modulated gratings with a period of about 50 nm and less can be fabricated by immersion holographic method. Th…

Materials scienceChalcogenidebusiness.industryOptical engineeringHolographylaw.inventionAmorphous solidchemistry.chemical_compoundOpticschemistrylawOptical recordingThin filmbusinessRefractive indexLithographySPIE Proceedings
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Surface relief formation in amorphous chalcogenide thin films during holographic recording

2010

Abstract This report present the studies of direct holographic recording of the surface relief gratings on amorphous As2S3 films by 532 nm laser light. By giving extra time for recording exposure (more than necessary for volume amplitude-phase optical recording, e.g. Kikineshi, 2000 [2] ), changes of surface relief in the resist material can be observed. This direct surface relief formation phenomenon during holographic recording is discussed here from the side of recording light polarization. Efficiency of the relief formation may also depend on softening temperature of the film material and this influence was studied as well by using additional incoherent light for extra exposure during r…

Materials scienceChalcogenidebusiness.industryOrganic ChemistryHolographyOptical polarizationGratingAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsAmorphous solidlaw.inventionInorganic Chemistrychemistry.chemical_compoundOpticschemistryResistlawOptical recordingElectrical and Electronic EngineeringPhysical and Theoretical ChemistryThin filmbusinessSpectroscopyOptical Materials
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Active Media for Optical Data Processing

2002

Peculiarities of colour centre production and their recombination in photostimulated processes in doped alkali halide systems were examined in connection with their practical use as active photostimulable media in miniaturised optoelectronic and photonic devices. The specific interaction of unrelaxed H-centres and electrons with the dopants in different valence and electronic states open a way for widening the scope of multifunctional (logical and mathematical) optical data processing, including the optical chips.

Materials sciencePhotoluminescenceValence (chemistry)Dopantbusiness.industryPhotostimulated luminescenceMechanical EngineeringDopingCondensed Matter PhysicsOpticsMechanics of MaterialsOptical recordingColour centreOptoelectronicsGeneral Materials SciencePhotonicsbusinessMaterials Science Forum
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Computational imaging with single-pixel detection: Applications in scattering media

2014

We describe computational imaging techniques based on single-pixel detection providing multidimensional information of an input scene. The key element of the optical recording stage is a spatial light modulator which sequentially generates a set of intensity light patterns to sample the scene. In this way, it is possible to use single-pixel detectors to measure different optical parameters such as the light intensity, the spectral content, the polarization state, or the phase. The spatial distribution of these parameters is then computed by applying the theory of compressive sampling. In particular, in this contribution we present a new method to transmit images through scattering media. We…

PhysicsLight intensityOpticsSpatial light modulatorCompressed sensingbusiness.industryScatteringOptical recordingDetectorComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISIONbusinessPolarization (waves)Light scattering2014 13th Workshop on Information Optics (WIO)
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