Photostructural reconstructions of As-S and As-Se semiconductor glasses

Bordovsky, G. A.; Немов, С. А.; Анисимова, Н. И.; Dzemidko, I. A.; Марченко, А. В.; Серегин, П. П.

doi:10.1134/s1063782609030166

Cited by 5 publications

(4 citation statements)

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“…Amorphous As‐Se chalcogenides were used as model objects to investigate the correlation between cooperative rearranging region size determined at the glass transition temperature and the free volume fraction in the glassy state 12. Mössbauer emission spectroscopy was used to explain photo‐induced changes in the optical properties of semiconductor glasses of the As‐Se and As‐S systems using 129 Te ( 129 I) isotopes 13. Amorphous chalcogenide thin films can be prepared by different deposition techniques, typically by vacuum thermal evaporation, sputtering, CVD (chemical vapour deposition) or spin‐coating.…”

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confidence: 99%

“…12 Mö ssbauer emission spectroscopy was used to explain photo-induced changes in the optical properties of semiconductor glasses of the As-Se and As-S systems using 129 Te ( 129 I) isotopes. 13 Amorphous chalcogenide thin films can be prepared by different deposition techniques, typically by vacuum thermal evaporation, sputtering, CVD (chemical vapour deposition) or spin-coating. Pulsed laser deposition (PLD) is a prospective technique, being employed due to its simplicity, ease of process control, often stoichiometric transfer of target material to the films and the possibility to fabricate films of unusual composition.…”

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Laser desorption ionization time‐of‐flight mass spectrometric study of binary As‐Se glasses

Pangavhane

Němec

Wágner

et al. 2010

Rapid Comm Mass Spectrometry

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Binary chalcogenide As-Se glasses and their thin films are important for optics, computers, materials science and technological applications. To increase understanding of the properties of thin films fabricated by plasma deposition techniques, more information concerning the physics of plasma plume is needed. In this study the formation of clusters in plasma plume from different As-Se glasses by laser desorption ionization (LDI) or laser ablation (LA) was studied by time-of-flight mass spectrometry (TOF MS) in positive and negative ion modes. Formation of a number of As(p)Se(q) singly charged clusters As(3)Se(q)(+) (q = 1-5), AsSe(q)(-) (q = 1-3), As(2)Se(q)(-) (q = 2-4), and As(3)Se(q)(-) (q = 2-5) was found from As-Se glasses with the molar ratio As:Se in the range from 1:2 to 7:3. The stoichiometry of the As(p)Se(q) clusters was determined via isotopic envelope analysis and computer modeling. The structure of the clusters is proposed and the relationship to the structure of the parent glasses, as also suggested by Raman scattering spectra, is discussed.

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confidence: 99%

mentioning

confidence: 99%

Laser desorption ionization time‐of‐flight mass spectrometric study of binary As‐Se glasses

Pangavhane

Němec

Wágner

et al. 2010

Rapid Comm Mass Spectrometry

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“…An important question to be answered is: how does a grating form in composite films? We suggested that the particles of chalcogenide at the point of maximum recombine in another amorphous modification, as shown, e.g., in [8]. At the same time, photochrome particles recombine to another isomerization form.…”

Section: Resultsmentioning

confidence: 99%

Formation of Direct Surface Relief in Photochrome-Chalcogenide Composites

Gerbreders¹,

Teteris²

2010

Latvian Journal of Physics and Technical Sciences

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A method for preparation of thin triple composite films of organic polymerchalcogenide-photochromes is described, the photo-induced changes of optical properties and holographic recording are considered. The films were obtained from solutions of arsenic sulphide, azobenzene Disperse Red 1, spiropyran, and organic polymers in organic solvents. The solutions were spread over glass or quartz substrates; the thickness of dry films was 3-10 μm. The absorption spectra of the prepared films were studied and analyzed. The holographic recording of diffraction gratings was performed by laser lines of 325 nm, 442 nm and 532 nm. During recording the diffraction efficiency was measured simultaneously in the transmission and reflection modes. The relief formation on the film surface was observed and the profile of the gratings formed was analyzed using AFM microscope. The influence of photoisomerization and photo-induced mass transport on the surface relief formation process is discussed.

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“…We assumed that the particles of chalcogenide situated at a maximum recombine in another amorphous modification, as shown, for example, in [8]. At the same time, photochrome particles recombine to another isomerization form.…”

Section: Resultsmentioning

confidence: 99%

Holographic recording in photochrome-chalcogenide composites

Gerbreders¹,

Aleksejeva²,

Danilovs³

et al. 2010

Lithuanian J. Phys.

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The method of preparation of thin triple composite films of organic polymer-chalcogenide-photochromes is described, and some features of photo induced changes of optical properties and holographic recording in this system are studied.Films of composite were obtained from solutions of arsenic sulphide and organic polymers, such as "Disperbyk" (produced by BYK-Chemie GmbH) and polyvinylacetate in organic solvents. The azobenzene DR-1 and spiropyran solutions were added in this mixture. The films were obtained by casting the material on glass or quartz substrate. The dry film thickness was in the range of 3-10 µm.The changes of absorption spectra of the films induced by UV (248, 325, and 375 nm) laser light were studied and analysed. The holographic recording of diffraction gratings was performed by different laser lines (325, 442, and 532 nm). During recording the diffraction efficiency was measured simultaneously in transmission and reflection mode. The formation of relief on the film surface was observed and the profile of the gratings was analysed by atomic force microscope. The influence of photoisomerization and photo induced mass transport on the surface-relief formation process has been discussed.

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Photostructural reconstructions of As-S and As-Se semiconductor glasses

Cited by 5 publications

References 0 publications

Laser desorption ionization time‐of‐flight mass spectrometric study of binary As‐Se glasses

Laser desorption ionization time‐of‐flight mass spectrometric study of binary As‐Se glasses

Formation of Direct Surface Relief in Photochrome-Chalcogenide Composites

Holographic recording in photochrome-chalcogenide composites

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