Investigation of trigonal (La1−xNdx)3Ga5SiO14 crystals. I. Growth and optical Properties

Abstract

The growth features of trigonal La3Ga5SiO14 and Nd3Ga5SiO14 crystals and their solid solutions from the melt by Czochralski technique are studied. Optimal conditions are found and oriented (La1−xNdx)3 Ga5SiO14 single crystals are grown with 28 mm in diameter and 280 g by weight, of optical quality perfect to carry out excitation experiments on Nd3+ ion stimulated emission as well as investigations of acoustooptic and electromechanical properties of La3Ga5SiO14 crystals. Structural peculiarties and desorderness of La1−xNdx)3Ga5SiO14 crystals are considered. Crystal optics of La3Ga5SiO14 – linear dichroism and dispersion of refractive indexes (by a modified prism method), optical activity, and other optical characteristics are investigated. A comparison is made of some optical properties of La3Ga5SiO14 crystals and crystalline SiO2.

Langasite Family Midinfrared Nonlinear Optical Oxide Materials: Structure, Property, and Applications

“…Since they show no phase transitions up to their melting points of approximately 1470 ∘ C, the material is considered to be able to replenish or even replacequartz as surface acoustic wave (SAW) filters and sensors for pressure, force, and acceleration at high temperatures [26]. In 1983, Kaminskii et al reported the laser properties of (La 1− Nd ) 3 Ga 5 SiO 14 (Nd:LGS) crystal for the first time and made a preliminary estimate about the crystal of some other uses [27,28]. Subsequently, the growth and laser properties of LGS, Nd:LGS, and Nd-doped Ca 3 Ga 2 Ge 4 O 14 (CGG) and Sr 3 Ga 2 Ge 4 O 14 (SGG) were studied in 1983, and their properties such as optics, piezoelectricity, elasticity, and typical values were also measured [29].…”

PPMS-based set-up for Raman and luminescence spectroscopy at high magnetic field, high pressure and low temperature

“…Langasite materials are well known for their piezoelectric and non-linear optical properties [21,22]. A recent interest in the magnetic and electrical properties of langasite materials is due to the discovery that they could crystalize in a Kagomé-like lattice structure consisting of rare-earth and transition metal cations [23,24].…”

Origin of Piezoelectricity on Langasite

“…In the author's laboratory, KNO 3 being basically hard sintering materials was successfully formed as high density ceramics co-doping of La 2 O 3 and Fe 2 O 3 by Kakimoto et al (2004), and Guo et al (2004) LGS) group crystals are also Pb-free piezoelectric material, which are being reviewed just in this chapter, presented by and Kaminskii et al, (1983).…”