Spectroscopic properties of Sm 3+ -doped NaGd(MoO 4 ) 2 crystal for visible laser application

Highly Efficient Orange-Red Emission in Sm3+-Doped Yttrium Gallium Garnet Single Crystal

“…The average decay time of the sample is then defined by (6) [49]: The fluorescence lifetimes for the 4 G5/2 → 6 H7/2 emission peak from YGG: Sm 3+ and YAG: Sm 3+ single crystals were then calculated to be 0.705 ms and 0.466 ms, respectively (Table 4). Thus, the fluorescence lifetime of YGG: Sm 3+ is not only longer than that of the YAG: Sm 3+ crystal, but it is also longer than those of CaGdAlO4: Sm 3+ (0.69 ms) and NaGd(MnO4): Sm 3+ crystals (0.5574 ms) [18,52,53]; this is probably the consequence of the greater intensity of its 4 G5/2 → 6 H7/2 emission peak, which allows for a greater participation of Sm 3+ ions in this transition and results in a longer fluorescence lifetime [54,55].…”

Optical transition and luminescence properties of Sm3+‐doped YNbO4 powder phosphors

“…[1][2][3][4][5] Among the RE 3+ ions, the trivalent samarium (Sm 3+ ) ion is one of the prime dopant candidates to realize efficient fluorescence conversion owing to its abundant energy levels which cover a wide spectral range from ultraviolet to infrared light. 6,7 To date, many investigations have focused on the fluorescent properties, energy-transfer mechanism, chromatic properties as well as the thermal stability property of Sm 3+ -doped optical materials. [8][9][10] But, for the optical transition properties of Sm 3+ , the investigations were only limited to the Sm 3+ -doped transparent glasses and single crystals.…”

“…[8][9][10] But, for the optical transition properties of Sm 3+ , the investigations were only limited to the Sm 3+ -doped transparent glasses and single crystals. 6,[11][12][13][14][15] As is known to all, Judd-Ofelt (J-O) is a helpful method to understand and predict the optical transition properties of RE 3+ ions in luminescent materials. 16,17 When the J-O parameters Ω λ (λ = 2, 4, 6) are confirmed, some useful parameters for expressing physical properties of RE 3+ ions, such as oscillator strengths, radiative transition rates, quantum efficiency, and fluorescence branching ratios, can be derived.…”