Photoluminescence study of Er-doped zinc-sodium-antimonite glasses

0436199 - ÚFE 2015 RIV NL eng J - Journal Article
Zavadil, Jiří - Ivanova, Z. G. - Kostka, Petr - Hamzaoui, M. - Soltani, M.
Photoluminescence study of Er-doped zinc-sodium-antimonite glasses.
Journal of Alloys and Compounds. Roč. 611, 25 October (2014), s. 111-116. ISSN 0925-8388. E-ISSN 1873-4669
R&D Projects: GA ČR GAP106/12/2384; GA MŠMT(CZ) 7AMB14SK009
Institutional support: RVO:67985882 ; RVO:67985891
Keywords : Erbium * Photoluminescence * Antimonite glasses
Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering; BM - Solid Matter Physics ; Magnetism (USMH-B)
Impact factor: 2.999, year: 2014

Bulk samples of Er-doped zinc-sodium-antimonite glasses have been investigated by transmission and photoluminescence (PL) spectroscopy. Two series of compositions, (Sb2O3)(90) (x)(Na2O)(10)(ZnO)(x) and (Sb2O3)(80) (x)(Na2O)(20)(ZnO)(x), doped with 0.25 mol% Er2O3, have been chosen for this study. Transmission spectra exhibit sharp absorption bands centred at 450, 489, 521, 545, 652, 795, 975 and 1530 nm, which correspond to absorption of Er3+ ions and they are attributed to the optical transitions from the ground state I-4(15/2) to the excited states F-4(5/2), F-4(7/2), H-2(11/2), S-4(3/2), F-4(9/2), I-4(9/2), I-4(11/2) and I-4(13/2), respectively. The optical gap has been found to vary from 3.09 to 3.15 eV with a tendency to decrease at higher Na2O and/or ZnO contents. Four extrinsic bands due to OH, Si-O, CO2, and (CO3)(2) carbonate group vibrations have been identified in the infrared region. Emission spectra are overwhelmed by narrow 4f-4f emission bands. Fine structure of emission bands at 980 and 1530 nm, corresponding to radiative transitions from two lowest excited states of Er3+ ions to the ground state manifold have been investigated at room temperature and at 4 K. A schematic energy diagram of Stark levels splitting for the three lowest manifolds I-4(11/2), I-4(13/2) and I-4(15/2) has been deduced and the nature of temperature broadening of 4f-4f PL bands has been discussed
Permanent Link: http://hdl.handle.net/11104/0239984