TY - JOUR
T1 - Investigations on the physical, structural, optical and photoluminescence behavior of Er
3+
ions in lithium zinc fluoroborate glass system
AU - Prabhu, Nimitha S.
AU - Hegde, Vinod
AU - Sayyed, M. I.
AU - Şakar, E.
AU - Kamath, Sudha D.
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/5/1
Y1 - 2019/5/1
N2 -
Family of lithium zinc fluoroborate glasses with 15ZnF
2
-10BaO-8Al
2
O
3
–12Li
2
O-(55-x) B
2
O
3
-xEr
2
O
3
(x = 0.5, 0.7, 1.1, 1.3 and 1.5 mol%) composition were prepared by conventional melt-quench method. The glasses were characterized to study their structural, physical, optical and radiative properties. The amorphous characteristic of glass was noticed in X-Ray Diffraction pattern. A modification in structure was observed as density values increased with Er
2
O
3
content. UV–Vis–NIR transitions of Er
3+
in the host matrix were identified through absorption spectra. Covalent nature of bonding between Er
3+
ions and their surrounding ligands was observed through bonding parameter and Judd-Ofelt parameters. Red shift of the fundamental absorption edge in the absorption spectra and decreasing indirect and direct band gaps with increasing Er
3+
concentration jointly confirmed the role of Er
3+
ions as network modifier. Hypersensitive transitions of Er
3+
ion namely
4
I
15/2
→
2
H
11/2
&
4
I
15/2
→
4
G
11/2
were interpreted through their higher oscillator strengths when compared to other transitions. Emission spectra recorded at 980 nm excitation showed a peak corresponding to
4
I
13/2
→
4
I
15/2
NIR transition of erbium ion. Stimulated emission cross section of Er0.5 sample, gain bandwidth and Figure of Merit were found to be 16.79 × 10
−21
cm
2
, 1225.83 × 10
−28
cm
3
and 37.36 × 10
−24
cm
2
s respectively. Photoluminescence decay curve of Er0.5 sample was well-fitted to single exponential first order function. The experimental decay lifetime τ
exp
for the
4
I
13/2
level was measured to be 0.34 ms. The wide frequency range of FWHM (1.02–1.67 × 10
13
Hz) and high values of radiative parameters make the glass a suitable candidate as optical amplifier and NIR laser material.
AB -
Family of lithium zinc fluoroborate glasses with 15ZnF
2
-10BaO-8Al
2
O
3
–12Li
2
O-(55-x) B
2
O
3
-xEr
2
O
3
(x = 0.5, 0.7, 1.1, 1.3 and 1.5 mol%) composition were prepared by conventional melt-quench method. The glasses were characterized to study their structural, physical, optical and radiative properties. The amorphous characteristic of glass was noticed in X-Ray Diffraction pattern. A modification in structure was observed as density values increased with Er
2
O
3
content. UV–Vis–NIR transitions of Er
3+
in the host matrix were identified through absorption spectra. Covalent nature of bonding between Er
3+
ions and their surrounding ligands was observed through bonding parameter and Judd-Ofelt parameters. Red shift of the fundamental absorption edge in the absorption spectra and decreasing indirect and direct band gaps with increasing Er
3+
concentration jointly confirmed the role of Er
3+
ions as network modifier. Hypersensitive transitions of Er
3+
ion namely
4
I
15/2
→
2
H
11/2
&
4
I
15/2
→
4
G
11/2
were interpreted through their higher oscillator strengths when compared to other transitions. Emission spectra recorded at 980 nm excitation showed a peak corresponding to
4
I
13/2
→
4
I
15/2
NIR transition of erbium ion. Stimulated emission cross section of Er0.5 sample, gain bandwidth and Figure of Merit were found to be 16.79 × 10
−21
cm
2
, 1225.83 × 10
−28
cm
3
and 37.36 × 10
−24
cm
2
s respectively. Photoluminescence decay curve of Er0.5 sample was well-fitted to single exponential first order function. The experimental decay lifetime τ
exp
for the
4
I
13/2
level was measured to be 0.34 ms. The wide frequency range of FWHM (1.02–1.67 × 10
13
Hz) and high values of radiative parameters make the glass a suitable candidate as optical amplifier and NIR laser material.
UR - https://www.scopus.com/pages/publications/85062099887
UR - https://www.scopus.com/inward/citedby.url?scp=85062099887&partnerID=8YFLogxK
U2 - 10.1016/j.infrared.2019.02.005
DO - 10.1016/j.infrared.2019.02.005
M3 - Article
AN - SCOPUS:85062099887
SN - 1350-4495
VL - 98
SP - 7
EP - 15
JO - Infrared Physics and Technology
JF - Infrared Physics and Technology
ER -