Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8161373 | Physica B: Condensed Matter | 2018 | 7 Pages |
Abstract
Sm3+ -doped oxyfluoride tellurite-tungsten (TWGSm) glasses were prepared by conventional melt quenching method. The optical properties were investigated through photoluminescence excitation, emission and luminescence decay analysis. The optical band gap energy was determined as â¼3.425â¯eV for 1.0â¯mol% of Sm3+ -doped TWGSm glass. Upon 404â¯nm excitation, the TWGSm glasses emit luminescence through 4G5/2â¯ââ¯6H5/2 (563â¯nm), 4G5/2â¯ââ¯6H7/2 (600â¯nm), 4G5/2â¯ââ¯6H9/2 (645â¯nm) and 4G5/2â¯ââ¯6H11/2 (705â¯nm) transitions. The Judd-Ofelt analysis was performed using absorption spectrum and obtained radiative parameters were used to estimate the laser characteristics of present glasses. The concentration of Sm3+ has been optimized as 1.0â¯mol% for efficient luminescence. The luminescence decay of 4G5/2 emission level was studied by monitoring the emission and excitation wavelengths at 600 and 404â¯nm, respectively. The experimental lifetime of 4G5/2 level was decrease with increase of Sm3+ concentration. The 1.0â¯mol% of Sm3+ -doped TWGSm glass could be the best choice for solid state visible lasers to emit orange luminescence.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
T. Subrahmanyam, K. Rama Gopal, R. Padma Suvarna, B. Chinna Jamalaiah, Ch Srinivasa Rao,