Univerzita Pardubice Fakulta chemicko- technologická

Univerzita Pardubice

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Publikace detail

Optical properties of Er3 -doped and Er3 /Yb3 -co-doped GeGaSbS chalcogenide glasses

Autoři: Himics Dianna | Střižík Lukáš | Holubová Jana | Beneš Ludvík | Oswald Jiří | Wágner Tomáš

Rok: 2016

Druh publikace: ostatní - přednáška nebo poster

Strana od-do: nestránkováno

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
eng	Optical properties of Er3 -doped and Er3 /Yb3 -co-doped GeGaSbS chalcogenide glasses	We prepаred sаmples bаsed on composition GeGaSbS doped with rаre-eаrth elements (Er3+ or co-doped with Er3+/Yb3+) by melt-quenching technique аnd investigаted the compositionаl dependencies of their physico-chemicаl properties аnd structure.The spectroscopic characterization of prepared chalcogenide glasses has been carried out through X-ray diffraction, Raman, absorption and luminescence spectra. All of the measured XRD patterns confirmed the amorphous characteristic of the perpared glasses. We investigated glass-forming ability, physico-chemicаl properties, structure and effective 4I15/24I13/2 (1.5 µm), 4I15/24F9/2 (660 nm), 4I15/24S3/2 (550 nm) and 4I15/22H11/2 (530 nm) electronic transition emissions of Er3+/Yb3+ ions and Er3+ ions under 980 nm laser pumping for the our composition. Our samples have good thermal stability, because this is considered when the ∆T (= TcTg) value is higher than 100 °C. The observed absorption bands are due to the transitions from the ground state 4I15/2 to the 4I13/2, 4I11/2, 4I9/2, 4F9/2, 4S3/2, 2H11/2 excited states of Er3+ ion. The intense absorption band at 980 nm is due to the large contributions of the ground state absorption of Yb3+ ion, which arises from the 2F7/22F5/2 transition, and to the absorption of the ground state of the Er3+ through the transition 4I15/24I11/2. The Judd-Ofelt intensity parameters were calculated for glasses and are used to evaluate radiative properties such as transition probalities, branching ratios and radiative lifetime. The intensity parameters determined in the present investigation are found to be of the order 2 > 4 > 6.	chalcogenide glasses; rare-earth elements; absoption; Judd-Ofelt theory; luminescence