A probe of the radiation field magnetic component based on octahedral Yb³⁺ in the CaNbGa garnet – CNGG – single crystal

Abstract

Magnetic-dipole photoluminescence from octahedral Yb3+ in CaNbGa garnet is proposed for sensing the magnetic component of plasmonic radiated fields.

A roadmap for laser optimization of Yb:Ca3(NbGa)5O12-CNGG-type single crystal garnets

“…18 Room temperature thermal conductivity of CNGG is intermediate, reaching 4.4 W m À1 K À1 in undoped CNGG and 3.63 W m À1 K À1 for Li-modified 7.57 at% Yb:CLNGG. 19 Although a minor (o5 Â 10 18 cm À3 ) amount of Yb 3+ can be found in the octahedral [16a] site of this garnet 20 the majority of Yb sits at the dodecahedral {24c} site, which is also occupied by Ca 2+ and eventually with a small amount (1.5%) of {}} vacancies, being surrounded by several oxygen polyhedra: four other nearest dodecahedra {24c}, four corner-sharing octahedra [16a] and six tetrahedra (24d), four of the latter sharing corners and the two others, at the shortest distance, sharing edges. In undoped CNGG the octahedral site is mostly filled by Nb 5+ (E62%) with a minor amount of Ga 3+ (E37%) and [&] vacancies (E0.3%), while the tetrahedral site is mostly filled by Ga 3+ (E82%) with minor occupancy of Nb 5+ (E10%) and ( ¤ ) vacancies (E8%).…”

Exploration of the Crystal Growth and Crystal-Field Effect of Yb3+ in Orthorhombic GdScO3 and LaLuO3 Crystals

“…To further study the occupation condition of Yb 3+ ions in Yb:GdScO 3 and Yb:LaLuO 3 crystals, the low-temperature PL survey was conducted to reduce the thermally induced homogeneous spectral broadening caused by lattice vibrations. 47 The intrinsic electronic transitions and related inhomogeneous spectral broadening of fluorescence spectra can be observed in the low-temperature PL investigation. The low-temperature emission spectra of the Yb:GdScO 3 crystal are shown in Figure 4a,b.…”

Growth of 60 mm-diameter Yb:CNGG single crystals with disordered coordination structure for high-energy laser systems

“…Such a disordered coordination structure results in an abundance of Yb 3+ ions in the local coordination environment. 15,[23][24][25] XRPD analysis was employed to investigate the crystalline phase of the as-grown Yb:CNGG crystal. As depicted in Fig.…”