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Photoluminescence properties of Er-doped Ge–In(Ga)–S glasses modified by caesium halides

  1. 1.
    0480763 - ÚSMH 2018 RIV DE eng J - Článek v odborném periodiku
    Ivanova, Z.G. - Zavadil, Jiří - Kostka, Petr - Djouama, T. - Reinfelde, M.
    Photoluminescence properties of Er-doped Ge–In(Ga)–S glasses modified by caesium halides.
    Physica Status Solidi B. Roč. 254, č. 6 (2017), č. článku 1600662. ISSN 0370-1972. E-ISSN 1521-3951
    Institucionální podpora: RVO:67985891
    Klíčová slova: caesium halides * chalcohalide glasses * erbium doping * transmission spectroscopy * photoluminiscence
    Obor OECD: Ceramics
    Impakt faktor: 1.729, rok: 2017

    Chalcohalide Ge-In-S and Ge-Ga-S glasses modified by CsX (X = Cl, Br, and I), and doped with Er in the range from 0.1 to 0.5 at.%, have been prepared and investigated. The influence of CsX addition on their optical properties has been studied by transmission and photoluminescence spectroscopy. Nominal compositions of [Ge25In(Ga)(10)S-65](90)(CsX)(10) have been selected as host materials. The shift of the absorption edge as a function of caesium halides is observed in GeInS (CsX) system with maximum band gap observed for CsI. The low-temperature photoluminescence reveals the broad band luminescence of the host glass centered at around the half of the band gap energy with superimposed 4f-4f radiative transitions of Er3+ ions. The position of the broad luminescence band is considerably shifted to higher energy in the case of CsI ascompared to CsCl and CsBr. In the case of Er-doped chalcohalide (Ge25Ga10S65)(90)(CsBr)(10) system, a considerable narrowing of I-4(13/2) -> I-4(15/2) radiative transitions of Er3+ ions accompanied by the pronounced splitting of the emission sub-bands clearly documents the increasing ceramics-like nature in the host material due to the admixture of CsBr. The influence of CsBr concentration on the shape of the broad-band luminescence of Ge-Ga-S-CsBr host is also reported.
    Trvalý link: http://hdl.handle.net/11104/0276460

     
     
Počet záznamů: 1  

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