CsCl effect on the optical properties of the 80GeS2–20Ga2S3 base glass

Masselin, P.; Coq, David Le; Calvez, Laurent; Petracovschi, Elena; Lépine, Eric; Бычков, Е.; Zhang, Xianghua

doi:10.1007/s00339-011-6668-6

Cited by 41 publications

(36 citation statements)

References 24 publications

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“…For the other host glass, (72GeS 2 -28Ga 2 S 3 ) 100 À x (NaX) x , 0rxr 15, the decrease is less pronounced since T g decreases from 428 1C down to 383 1C and 382 1C for NaCl and NaI, respectively. This behavior is not surprising since other works in GeS 2 -Ga 2 S 3 based systems have shown a similar trend, notably in the pseudo-ternary GeS 2 -Ga 2 S 3 -CsCl or CsI system [20,21]. This is traditionally ascribed to the progressive breaking of Ge-S or Ga-S bonds forming Ga(Ge)S 3/2 X À that leads to a decrease of the connectivity of the glass network.…”

Section: Macroscopic Propertiesmentioning

confidence: 69%

“…From the (80GeS 2 -20Ga 2 S 3 ) host glass E g evolves from 0.05 eV and 0.19 eV by adding up to 15 mol% of NaI and NaCl, respectively, and from the (72GeS 2 -28Ga 2 S 3 ) host glass E g progresses from 0.12 eV and 0.27 eV in similar conditions. These general behaviors are often observed when halogen is introduced in the composition of a chalcogenide glasses [20]. As already mentioned, the introduction of chlorine or iodine is supposed to progressively break the Ge-S or Ga-S to form Ga(Ge)S 4À y X y tetrahedral units.…”

Section: Optical Propertiesmentioning

confidence: 93%

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Influence of NaX (X=I or Cl) additions on GeS2–Ga2S3 based glasses

Bréhault¹,

Cozic²,

Boidin³

et al. 2014

Journal of Solid State Chemistry

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a b s t r a c tChalcogenide glasses in the pseudo-ternary system NaX-GeS 2 -Ga 2 S 3 (X¼ Cl or I) were synthesized. Different series were investigated in order to highlight the influence of the sodium halide addition on two different host glasses (GeS 2 ) 80 (Ga 2 S 3 ) 20 and (GeS 2 ) 72 (Ga 2 S 3 ) 28 . Macroscopic properties including density and characteristic temperatures, such as glass transition temperatures T g and crystallization temperature T x , were determined for a maximum molar content of NaX equal to 15%. The evolution of the optical band-gap and the chemical stability following the composition were also studied. Conductivity measurements were also performed and compared to other Li-based GeS 2 -Ga 2 S 3 glasses. The results were discussed taking into account the cation and anion nature and also the glass packing density.

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Section: Macroscopic Propertiesmentioning

confidence: 69%

Section: Optical Propertiesmentioning

confidence: 93%

Influence of NaX (X=I or Cl) additions on GeS2–Ga2S3 based glasses

Bréhault¹,

Cozic²,

Boidin³

et al. 2014

Journal of Solid State Chemistry

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“…The increase of the lifetime τ int and the intensity I int in the recalculated final x2-spectrum for (80GeS 2 -20Ga 2 S 3 ) 95 (CsCl) 5 and (80GeS 2 -20Ga 2 S 3 ) 90 (CsCl) 10 glasses with respect to (80GeS 2 -20Ga 2 S 3 ) 100 (CsCl) 0 glass indicate that realistic process is very likely connected with the expansion of voids formed as a consequence of CsCl addition and full crystallization into inner structure of glasses.…”

Section: Resultsmentioning

confidence: 99%

“…It was shown that alkali halides like CsCl, added into GeS 2 -Ga 2 S 3 glassy matrix, expanded the visible transmission window towards shorter wavelengths [4,5]. Moreover, thermal, mechanical and physical properties of GeS 2 -Ga 2 S 3 -CsCl glasses can be improved by a controlled crystallization during heat treatment [6,7].…”

Section: Introductionmentioning

confidence: 98%

Free‐volume nanostructural transformation in crystallized GeS₂–Ga₂S₃–CsCl glasses

Klym

Ingram

Shpotyuk

2016

Materialwissenschaft Werkst

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The free-volume nanostructural transformation in fully crystallized (80GeS 2 -20Ga 2 S 3 ) 100-x (CsCl) x , x = 0; 5; 10; 15 chalcogenide glasses was studied by positron annihilation lifetime spectroscopy using mixed positron-and positronium-trapping modes. The CsCl content in GeS 2 -Ga 2 S 3 glassy matrix changed the defect-related component in positron lifetime spectra and confirmed the structural void agglomeration in comparison with the base glass. A larger amount of CsCl in (80GeS 2 -20Ga 2 S 3 ) 85 (CsCl) 15 glass resulted in void fragmentation due to loosening of the structure. "Pure" positron-positronium modes calculated by a decomposition formalism show that a realistic process is connected with the expansion of voids formed as a consequence of CsCl addition and complete crystallization into the inner structure of glasses. The CsCl additive formed new positron-trapping sites in the GeGa-S glassy matrix. The bulk positron lifetime in glasses corresponded to positron trapping occurring in nanocrystalline particles. Interface voids were not particularly large because the characteristic value of 0.27-0.30 ns can be connected with typical free volumes of mono-and di-vacancies.

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“…The glass composition is 80 GeS 2 -20 Ga 2 S 3 and it has been synthesized according to classical melt and quenching technique [1]. The sample is irradiated by a high repetition rate femtosecond Ti:Sa laser.…”

Section: Methodsmentioning

confidence: 99%

Spatially resolved correlation between glass structure and refractive index modifications resulting from irradiation of chalcogenide glass by femtosecond pulse train

Masselin

Coq

Cuisset

et al. 2013

MATEC Web of Conferences

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A detailed analysis of 2D µ-Raman mapping of refractive index variation (∆n) induced by femtosecond filament in the bulk of a ternary (Ge-Ga-S) chalcogenide glass is presented. The results demonstrate strong structural modifications. S 3 Ga-GaS 3 ethane like units are transformed into triclusters of Ga/S. Also the decrease of the population of GeS 4/2 tetrahedrons implies the formation of mixed triclusters T/S where T=Ga and/or Ge. Finally, the refractive index variation is correlated to the structural modifications.

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CsCl effect on the optical properties of the 80GeS2–20Ga2S3 base glass

Cited by 41 publications

References 24 publications

Influence of NaX (X=I or Cl) additions on GeS2–Ga2S3 based glasses

Influence of NaX (X=I or Cl) additions on GeS2–Ga2S3 based glasses

Free‐volume nanostructural transformation in crystallized GeS₂–Ga₂S₃–CsCl glasses

Spatially resolved correlation between glass structure and refractive index modifications resulting from irradiation of chalcogenide glass by femtosecond pulse train

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CsCl effect on the optical properties of the 80GeS2–20Ga2S3 base glass

Cited by 41 publications

References 24 publications

Influence of NaX (X=I or Cl) additions on GeS2–Ga2S3 based glasses

Influence of NaX (X=I or Cl) additions on GeS2–Ga2S3 based glasses

Free‐volume nanostructural transformation in crystallized GeS2–Ga2S3–CsCl glasses

Spatially resolved correlation between glass structure and refractive index modifications resulting from irradiation of chalcogenide glass by femtosecond pulse train

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Free‐volume nanostructural transformation in crystallized GeS₂–Ga₂S₃–CsCl glasses