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Optical properties and local structure of (As2S3)100-x(SbSI)x glasses
1Shpak A.P., 2Rubish V.M., 3Mykaylo O.A., 3Kaynts D.I., 2Guranich O.G., 2Rosul R.R.

1G. Kurdyumov Institute for Metal Physics, NASU, Kiev, Ukraine
2Uzhgorod Scientific-Technological Center of the Institute for Information Recording, NASU, Uzhgorod, Ukraine
3Uzhgorod National University, Uzhgorod, Ukraine

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We report experimental results for the spectral dependences of the optical absorption edge in (As2S3)100-x(SbSI)x (0 ≤ x ≤ 90) glasses. Our studies have shown that increasing of antimony sulfoiodide (SbSI) content in the glass composition and the temperature increase lead to shift in the absorption edge towards long-wavelength range. The optical absorption edge Eg  positions are determined. The slope change observed for the absorption edge in the temperature range of Tg ÷ Tc is conditioned by generation of nanocrystals of antimony sulfoiodide in the glassy matrix.

Keywords: chalcogenide glasses, local structure, dielectric properties, ferroelectric glass ceramic

PACS: 42.25.Bs
UDC: 535.3
Ukr. J. Phys. Opt. 11 106-113   doi: 10.3116/16091833/11/2/106/2010
Received: 18.03.2010

Анотація. В даній роботі представлені результати експериментального дослідження спектрального положення краю поглинання стекол (As2S3)100-x(SbSI)x (0 ≤ x ≤ 90). Показано, що зростання концентрації сульфойодиду сурми (SbSI) у складі скла, як і зростання температури приводить до зміщення краю поглинання у довгохвильову область. Визначене положення краю поглинання Eg. Зміна нахилу кривої поглинання в області температур Tg ÷ Tc  зумовлюється утворенням нанокристалів сульфойодиду сурми в скляній матриці.
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