Micro-Raman spectra of bulk GexAsxSe1-2X chalcogenide glasses

Iaseniuc Oxana; Yovu M.; Ghiulnare A.; Mesterca Raluca; Jderu A.; Enachescu Marius

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IASENIUC, Oxana, YOVU, M., GHIULNARE, A., MESTERCA, Raluca, JDERU, A., ENACHESCU, Marius. Micro-Raman spectra of bulk GexAsxSe1-2X chalcogenide glasses. In: Proceedings of the Romanian Academy Series A - Mathematics Physics Technical Sciences Information Science, 2018, vol. 19, pp. 545-550. ISSN 1454-9069.

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Proceedings of the Romanian Academy Series A - Mathematics Physics Technical Sciences Information Science

Volumul 19 / 2018 / ISSN 1454-9069

Micro-Raman spectra of bulk Ge_xAs_xSe_1-2X chalcogenide glasses

Pag. 545-550

Iaseniuc Oxana¹, Yovu M.¹, Ghiulnare A.², Mesterca Raluca², Jderu A.², Enachescu Marius²³

¹ Institute of Applied Physics,
² University Politehnica of Bucharest,
³ Romanian Academy of Science

Disponibil în IBN: 21 iunie 2019

Rezumat

In this work are reported the Micro-Raman spectra of Ge_xAs_xSe_1-2x (x = 0.05÷0.30). The Micro-Raman spectra consist of three main peaks located around ν = 193 cm^-1, ν = 213 cm^-1, and ν = 255 cm^-1. The peaks around ν = 193 cm^-1 and ν = 213 cm^-1 could be attributed to the vibration of GeSe bonds. The presence of the Raman peak at ν = 255 cm^-1 is due to the bond-stretching vibration of the disordered Se chains and rings. With the increase of the Ge concentration this peak shifts to a higher wavenumber due to the shortening of Se chains. The peak around ν = 300 cm^-1 is characteristic to Ge-Ge vibration mode. The Ge concentration slightly changes the shape of Micro-Raman spectra, mainly its ratio of the intensity.

Cuvinte-cheie
chalcogenide glasses, Coordination number, Micro-, Raman spectra

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