Design, growth, and characterization of Y₂Mo₄O₁₅ crystals for Raman laser applications

Abstract

This work reports the crystal structure and physical properties of the Y2Mo4O15 crystal and its potential use in the Raman laser.

Crystallographic Insights into the Crystal Structure and Intrinsic Properties of Ca12Al14O33-Type Rb3LiZn2(MoO4)4Single Crystals

“…The strongest characteristic Raman shifts of the RLZM crystal are estimated to be located at 925 cm –1 , which can be assigned to symmetric stretching modes of the [MoO 4 ] motif, whereas the bands at approximately 873 cm –1 are caused by the asymmetric stretching mode of [MoO 4 ] polyhedra based on previous studies. , The observed bands around 250, 306, and 321 cm –1 are mainly ascribed to the translations of molybdenum and zinc atoms and the bending modes of Mo–O–Mo bridges. As previously stated, narrow bandwidth of Raman spectra is an important indicator to demonstrate the SRS effect. To this end, the full-width at half-maximum of Raman curves was measured to be 12 cm –1 , comparable to that of other molybdates, which suggests that RLZM exhibits an attractive potential for mid-IR Raman materials.…”

Unique excitation power density and pulse width-dependent multicolor upconversion emissions of Y2Mo4O15:Yb3+,Ho3+ for anti-counterfeiting and information encryption applications

“…1b). 26 Since Yb 3+ and The characteristic sharp green and red emission peaks are observed, which can be attributed to 5 S 2 , 5 F 4 -5 I 8 and 5 F 5 -5 I 8 transitions of Ho 3+ ions, respectively. 27 When the excitation power density increases from 0.5 to 100 W cm À2 , although the position of the emission peaks does not shift, the upconversion PL color shows an obvious change from red to yellow and then to green.…”

“…1b). 26 Since Yb 3+ and Ho 3+ ions have the same chemical valence state and a similar ionic radius to Y 3+ ions, the doped Yb 3+ and Ho 3+ ions will preferentially occupy the crystal lattice of Y 3+ ions in the host. XRD diffraction peaks of the obtained Y 2 Mo 4 O 15 :40%Yb 3+ ,2%Ho 3+ microcrystals correspond well to the standard comparison card PDF#53-0358, and no diffraction impurity peaks were observed (Fig.…”

Crystal growth and negative thermal expansion properties of a Y2Mo4O15 single crystal

“…At 25 °C, the Y 2 Mo 4 O 15 crystal crystallizes in a centrally symmetric space group P 2 1 / c and the refined lattice parameters are a = 6.8185 Å, b = 9.5913 Å, c = 10.5299 Å, β = 105.586°, V = 663.31 Å 3 ( Z = 2), which are in good agreement with reported data. 25 The three-dimensional structure of the Y 2 Mo 4 O 15 crystal is composed of MoO 4 tetrahedron and YO 7 decahedron, which are connected by O atoms like another A 2 M 4 O 15 family ( Fig. 8a ).…”

“…In 2020, the Y 2 Mo 4 O 15 bulk single crystal was grown for the first time in our group. 25 However, low transparency and obvious internal cracks of crystals seriously hindered our complete characterization of the properties of the crystal. To obtain high-quality and large-dimension crystals, the flux system, viscosity, and cooling rate were optimized in this work.…”