Structural transformations and optical properties of As2S3 chalcogenide glasses

Fekeshgazi, I. V.; V., K.; Matelesko, N. I.; Міца, В.; Borkach, E.

doi:10.1134/1.2010691

Cited by 12 publications

(7 citation statements)

References 7 publications

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“…Since 1950s, glassy g‐As 2 S 3 has been included to the group of commercial optical glasses used in the infrared (IR) region [ 1,2 ] and nowadays this glass is a canonical example of chalcogenide IR optical media. [ 3–7 ] Fibers, planar waveguides, and holographic devices have been developed from bulk chalcogenide glass, [ 2–6 ] enabling the development of the next‐generation photonic chip for ultrafast optical processing systems. [ 6 ] Practical application of glasses, films, and fibers as a media for high‐power optical elements requires avoidance of damages from thermal effects during irradiation.…”

Section: Introductionmentioning

confidence: 99%

Structural Nature of Boson Peak and Low‐Temperature Heat Excess in As₂S₃ Glass

Holomb

Tkáč

Mitsa

et al. 2020

Physica Status Solidi (b)

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Comparative analysis of experimentally measured Raman spectra of crystalline (c), glassy (g), and powdered c‐As2S3 samples is performed based on vibrational modes of As6S6+6/2 ring‐like nanoclusters being fully (“rigid”) or partially (“soft”) interconnected with the glassy matrix, calculated using density functional theory (DFT). Although good agreement is found in the 100–500 cm−1 spectral range, the DFT simulations show additional super‐low frequency modes of “soft” rings at wavenumbers being significantly lower than the “rigid” ring's vibrational band at 26 cm−1. Broadening of the relatively narrow low‐frequency band of “rigid” clusters is found to be dependent on the number of interconnections of “soft” clusters with the glassy matrix, demonstrating mixing of “rigid” and “soft” vibrations in the boson peak region of g‐As2S3. In addition, the shift of the super‐low frequency Raman modes of “soft” nanoclusters and equivalent characteristic temperature are found to be nonlinearly dependent on the number of interconnections. Comparison with experimental Raman spectroscopic and heat capacity data indicates that the main contribution of both the LF Raman intensity and the low‐temperature anomaly of specific heat at 5.3 K comes from “soft” clusters with four and two interconnections.

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Section: Introductionmentioning

confidence: 99%

Structural Nature of Boson Peak and Low‐Temperature Heat Excess in As₂S₃ Glass

Holomb

Tkáč

Mitsa

et al. 2020

Physica Status Solidi (b)

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“…Figure 4 shows the dependence of the band gap on the mean coordination number in ternary Ge x As y S 1-x-y glasses. We have shown earlier that during technological modification of binary arsenic tri-sulphide the nanophase inclusions of realgar type r-As 4 S 4 molecules modify the optical properties and change the level of TPA in g-As 2 S 3 [16].…”

Section: Experimental and Theoretical Detailsmentioning

confidence: 98%

Non‐linear optical properties and structure of wide band gap non‐crystalline semiconductors

Міца

Holomb

Vereš

et al. 2011

Phys. Status Solidi C

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The non‐linear two‐photon absorption coefficient (TPA) of ternary Ge‐As‐S glasses of different sections (As2S3‐GeS2, As2S3‐Ge2S3, As‐GeS2, As‐Ge2S3) was measured at 690 nm. The obtained data were interpreted based on the evolution of the glass structure and mean coordination number with the composition. Raman spectroscopy was used to investigate the bonding configuration of the glasses and the structural interpretation of the vibrational bands was performed based on DFT calculations of vibrational spectra of different types of As(Ge)nSm clusters and XPS measurements. It was found that the TPA is decreasing near the magic coordination numbers of 2.4 and 2.67. Relationship between TPA and nanophase separation in ternary glasses is discussed. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…Indeed, current fabrication approaches face challenges in controlling the core diameter, the core-to-cladding diameter ratio and index contrast, and the fiber outer diameter. Despite the decades-long development of ChG fibers [17], harnessing their high optical nonlinearity has been curtailed by their poor power-handling capabilities [18,19] and large normal group velocity dispersion (GVD) [20,21]. To overcome these obstacles in ChG fibers, novel approaches are required, particularly to achieve broadband SCG.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear characterization of robust multimaterial chalcogenide nanotapers for infrared supercontinuum generation

Shabahang¹,

Tao²,

Marquez³

et al. 2014

J. Opt. Soc. Am. B

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We present the results of an investigation of the nonlinear characteristics of a new class of robust, multimaterial, allsolid chalcogenide nanotapers prepared from high-index-contrast chalcogenide fibers. The fiber is drawn from a preform produced by multimaterial coextrusion and consists of chalcogenide core and cladding (which dictate the optical properties) and a built-in thermally compatible polymer jacket that provides mechanical stability to the fibers and nanotapers. We measure the nonlinear refractive indices both in the bulk chalcogenide glasses using the Z-scan method and directly in the nanotapers from spectral broadening resulting from self-phase modulation using both picosecond and femtosecond pulses. Such robust nanotapers offer many opportunities for dispersion engineering to optimize nonlinear optical fiber applications such as infrared supercontinuum generation. Lowpower femtosecond pulses (∼100 W peak power, corresponding to ∼40 pJ energy per pulse) centered at 1.55 μm wavelength launched into the nanotapers generated a supercontinuum extending over a full spectral octave, 1-2 μm. A computational model that takes into account the relevant linear and nonlinear optical parameters provides simulations that are in good agreement with the supercontinuum measurements.

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Structural transformations and optical properties of As2S3 chalcogenide glasses

Cited by 12 publications

References 7 publications

Structural Nature of Boson Peak and Low‐Temperature Heat Excess in As₂S₃ Glass

Structural Nature of Boson Peak and Low‐Temperature Heat Excess in As₂S₃ Glass

Non‐linear optical properties and structure of wide band gap non‐crystalline semiconductors

Nonlinear characterization of robust multimaterial chalcogenide nanotapers for infrared supercontinuum generation

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Structural transformations and optical properties of As2S3 chalcogenide glasses

Cited by 12 publications

References 7 publications

Structural Nature of Boson Peak and Low‐Temperature Heat Excess in As2S3 Glass

Structural Nature of Boson Peak and Low‐Temperature Heat Excess in As2S3 Glass

Non‐linear optical properties and structure of wide band gap non‐crystalline semiconductors

Nonlinear characterization of robust multimaterial chalcogenide nanotapers for infrared supercontinuum generation

Contact Info

Product

Resources

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Structural Nature of Boson Peak and Low‐Temperature Heat Excess in As₂S₃ Glass

Structural Nature of Boson Peak and Low‐Temperature Heat Excess in As₂S₃ Glass