TY - JOUR
T1 - High pressure effect in the near-infrared emission of Nd3+-doped alkali silicate glasses
AU - Montoya Matos, Israel
AU - Balzaretti, Naira Maria
N1 - Funding Information:
This work was financially supported for Brazilian agencies CAPES, CNPq and FAPERGS. The authors would like to thank the Microelectronic Group of the Institute of Physics of UFRGS for the spectroscopic characterization.
Publisher Copyright:
© 2021 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2021/12/16
Y1 - 2021/12/16
N2 - The effect of high pressure (7.7 GPa) densification on the absorption and near-infrared emission of Nd-doped lithium, sodium and potassium disilicate glasses was investigated. Judd-Ofelt parameters Ωλ (λ = 2, 4 and 6) were calculated from the absorption spectra, before and after densification of glasses, indicating that the irreversible structural changes induced by pressure increased the symmetry of the Nd-O bonding. Density and refractive index of the glasses also increased, probably related to the close packing of SiO4 tetrahedra during densification. The magnitude of the splitting due to the Stark effect was larger for potassium silicate, before and after densification. The radiative transition probabilities of the hypersensitive transition for sodium and potassium silicate increased after densification while the radiative lifetime decreased. For lithium silicate, the opposite behavior was observed. The experimental results corroborate the influence of alkali ion and densification on the luminescence properties of Nd-doped alkali silicate glasses.
AB - The effect of high pressure (7.7 GPa) densification on the absorption and near-infrared emission of Nd-doped lithium, sodium and potassium disilicate glasses was investigated. Judd-Ofelt parameters Ωλ (λ = 2, 4 and 6) were calculated from the absorption spectra, before and after densification of glasses, indicating that the irreversible structural changes induced by pressure increased the symmetry of the Nd-O bonding. Density and refractive index of the glasses also increased, probably related to the close packing of SiO4 tetrahedra during densification. The magnitude of the splitting due to the Stark effect was larger for potassium silicate, before and after densification. The radiative transition probabilities of the hypersensitive transition for sodium and potassium silicate increased after densification while the radiative lifetime decreased. For lithium silicate, the opposite behavior was observed. The experimental results corroborate the influence of alkali ion and densification on the luminescence properties of Nd-doped alkali silicate glasses.
KW - High pressure
KW - Judd–Ofelt parameters
KW - luminescence
KW - Nd: alkali silicate
UR - http://dx.doi.org/10.1080/08957959.2021.2012570
UR - http://www.scopus.com/inward/record.url?scp=85121749782&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/011af27c-3541-3dfa-b8f6-b102e987f559/
U2 - 10.1080/08957959.2021.2012570
DO - 10.1080/08957959.2021.2012570
M3 - Artículo (Contribución a Revista)
AN - SCOPUS:85121749782
SN - 1477-2299
VL - 42
SP - 1
EP - 13
JO - Journal High Pressure Research
JF - Journal High Pressure Research
IS - 1
ER -