Optical evaluation of multichannel radiative transitions originating from G45/2 level of Sm3+ in heavy-metal-gallate glasses

Abstract

Energy transfer characteristics of silicate glass doped with Er3+, Tm3+, and Ho3+ for 2μm emission J. Appl. Phys. 114, 243501 (2013); 10.1063/1.4852535 1.8 μ m emission of highly thulium doped fluorophosphate glasses J. Appl. Phys. 108, 083504 (2010); 10.1063/1.3499283 Spectroscopic properties and Judd-Ofelt theory analysis of Dy 3 + doped oxyfluoride silicate glassConventional visible and novel infrared ͑IR͒ emissions of Sm 3+ in heavy-metal-gallate glasses ͑Li 2 O-K 2 O -BaO-PbO-Bi 2 O 3 -Ga 2 O 3 , LKBPBG for short͒ with low phonon energy have been observed. Judd-Ofelt parameters ⍀ 2 ͑3.00ϫ 10 −20 cm 2 ͒, ⍀ 4 ͑5.19ϫ 10 −20 cm 2 ͒, and ⍀ 6 ͑1.69 ϫ 10 −20 cm 2 ͒ indicate a higher asymmetry and stronger covalent environment in the optical glasses. For the visible fluorescence bands peaked at 564, 601, 648, and 710 nm, the maximum stimulated emission cross-sections ͑ e ͒ were derived to be 1.35ϫ 10 −22 , 9.21ϫ 10 −22 , 9.58ϫ 10 −22 , and 3.91 ϫ 10 −22 cm 2 , respectively, the values are larger than those in phosphate, oxyfluoroborate, tellurite, and calibo glasses obviously. The observed 1185 nm IR emission lies in the low-loss window of telecommunication system, and the maximum value of e for this band was obtained to be 6.09 ϫ 10 −23 cm 2 . The characterization of multichannel radiative transitions of Sm 3+ in LKBPBG glasses is beneficial in exposing its potential applications in visible and IR optoelectronic devices.

Spectroscopic properties of Sm3+ ions in lead fluorophosphate glasses

“…which is similar to the trend observed in PKBASm10 [22], PKBFASm10 [22] and LKBPBG [30] glasses. From Table 3, the O 4 parameter is found to be higher in the present glass compared to PKBFASm10 [22], PbO-PbF 2 [24], PPNSm10 [25], PbO-PbF 2 -B 2 O 3 [26], LBTAFSm10 [27], lead borate [29], LKBPBG [30], PbO-GeO 2 -TeO 2 [31] and CdO-Al 2 O 3 -SiO 2 [32] glasses. The higher magnitude of O 4 in the present glass suggests higher rigidity of the medium and higher covalence around the Sm 3 þ ions.…”

“…The small root-mean-square deviation (s rms ) value of 70.58 Â 10 À 6 obtained between the experimental and calculated oscillator strengths indicates the good fit between the two values. The evaluated phenomenological JO intensity parameters, O 2 , O 4 and O 6 , are presented in Table 3 along with those reported for Sm 3þ :glasses [21,22,[24][25][26][27][28][29][30][31][32]. From the JO intensity parameters, the radiative parameters such as radiative transition probabilities (A R ) and fluorescence branching ratios (b R ) for the 6 H 5/2 , 6 H 7/2 6 H 9/2 and 6 H 11/2 levels of Sm 3þ ions in the title glasses have been determined and are shown in Table 4.…”

Influence of tungsten on the emission features of Nd3+, Sm3+ and Eu3+ ions in ZnF2–WO3–TeO2 glasses

“…The decay of exited states in Sm 3+ involves different mechanisms depending on the matrix. Earlier studies on optical absorption, fluorescence and lifetime measurements of Sm 3+ ions in oxyfluoroborate and oxide glasses have indicated the quenching of the fluorescence of 4 G 5/2 level [24,25]; this is attributed to quadrupole-quadrupole interaction among the samarium ions. Similarly, a number of earlier studies on spectroscopic properties of Sm 3+ ions in different glass matrices have revealed that the fluorescence yield of this rare earth ion is strongly dependent on its environment inside the glass network [26][27][28][29][30][31].…”

Antiquenching effect of modifying cations on samarium clustering: Physical, structural and luminescent behavior of heavy metal borate glass systems

“…This peak can be attributed to the transitions 4 F 3/2 ? 6 H 5/2 as it is a well-known fact that Sm 3+ has two more emitting levels, 4 F 3/2 and 4 G 7/2 besides 4 G 5/2 though they have comparatively smaller lifetime (stability) than 4 G 5/2 [50]. The integrated intensity { R I ð mÞdð mÞ} ratio among green, greenish yellow, reddish orange, red and near infrared bands achieved in this series is: 4:16:49:30:1.…”