Growth, Structure, and Evaluation of Laser Properties of LiYb(MoO₄)₂ Single Crystal

Abstract

Because of the incongruent melting of LiYb(MoO 4 ) 2 compound at 912 °C, Li 2 MoO 4 and Li 2 Mo 2 O 7 fluxes have been used to nucleate single crystals of this compound. From the latter flux, crystals of about 1 cm 3 have been pulled by the top-seeded solution-growth method. Details on the preparation and growth procedures are provided. The Li concentration in the crystal has been assessed using 7 Li(p,R) 4 He nuclear reaction induced by protons. The [Yb]/[Li] molar composition ratio obtained in several samples is in the 1.01-1.05 range. This result compares well with the ratio [Yb]/[Li] ) 1 expected from the above chemical formula, therefore nonextensive Li loss is experienced during the crystal growth. Polymorphic transformations to phases with symmetry lower than tetragonal have not been observed upon cooling. At room temperature the crystal structure shows the tetragonal space group I4 h (No. 82), with lattice parameters a ) 5.1191 (9) Å and c ) 11.109 (3) Å, V ) 291.11(10) Å 3 , and Z ) 2. This implies a high ytterbium density, namely [Yb] ) 6.87 × 10 21 cm -3 . The optical absorption and photoluminescence properties are described in detail consistently with the anisotropic character of the tetragonal phase. The relative energies of the Yb 3+ Stark levels have been determined and the perspectives for applications as a laser material are evaluated.

Growth, thermal and polarized spectral properties of Nd3+-doped Li3Ba2Gd3(MoO4)8 crystal

“…Therefore, considerable attention has been devoted to the search for new more efficient materials for pumping [1][2][3][4][5][6][7][8][9][10]. Among the reported crystals, some molybdate crystals with disordered structure have generated a great deal of interest due to their intriguing properties such as high damage threshold, wide absorption band and high quantum efficiency which made them promising materials for solid-state laser gain media [11][12][13][14][15][16].…”

Growth and spectral characteristics of Yb3+-doped LiLa(MoO4)2 crystal

“…Thus, it implicates that the Yb 3+ :LiLa(MoO 4 ) 2 crystal has a high laser threshold. Recently the continuous-wave laser operations of the Yb 3+ :NaLa (MoO 4 ) 2 and Yb 3+ :LiGd(MoO 4 ) 2 crystals have been demonstrated at room temperature [18,19]. Therefore, the Yb 3+ :LiLa(MoO 4 ) 2 crystal is expected as a potential solidstate laser crystal materials as well as the Yb 3+ :NaLa (MoO 4 ) 2 and Yb 3+ :LiGd(MoO 4 ) 2 crystals.…”

Crystal and band structure of K2AlTi(PO4)3 with the langbeinite-type structure

“…With the development of technology and science, there is an increasing need for new multifunctional magnetic materials, ultraviolet (UV) phosphors, scintillators, and laser materials, which have extensive applications in several domains [1][2][3][4][5][6][7][8][9]. Coordination networks based on [M 2 (PO 4 ) 3 ] fragment may result in diverse structure types with consequent interesting magnetism, electricity, optic and thermal expansion properties.…”