Structure and optical properties of rare earth-doped zinc oxyhalide tellurite glasses

Abstract

Zinc tellurite glasses appear to be excellent candidates for hosting rare earth ions since they provide a low phonon energy environment to minimize non-radiative losses as well as possess good chemical durability and optical properties. The optical behavior of the rare earth ion can be manipulated by modifying its local environment in the glass host. We report measurements of the emission lifetime, optical absorption, and vibrational density of states of the glass system (ZnO),(ZnF2),(Te02),~x~y doped (0.1 mol%) with a series of rare earths. Phonon sideband spectroscopy has been successfully employed to probe vibrational structure in the immediate vicinity of the rare earth ion. We observe a significant increase in the emission lifetime (from approximately 150 ps to 250 ps) of Nd3+ with increasing fluorine substitution.

Thermal stability and spectroscopic properties of Yb3+-doped zinc–tungsten–tellurite glasses

“…As laser or amplifier host materials, tellurite glasses combine the attributes of (1) a reasonably wide transmission region (0.35-5 m), compared to only 0.2-3 m for silicate glasses [10]; (2) good glass stabilities and corrosion resistances, which are better than those in fluoride glasses [11]; (3) a relative low phonon energy among oxide glass formers (largest phonon energy ∼800 cm −1 ) [12]; (4) high refractive index, n (typical e.g. 1.8-2.3) [13,14] and high non-linear indices, n 2 (typical e.g.…”

Laser induced fluorescence in europium doped zinc tellurite glasses

“…Photoluminescence from rare earth doped tellurite glasses are of major interest in the area of optoelectronic device applications like phosphors, display monitors, lasers and amplifiers for communication systems etc. Tellurite glasses exhibit high rare earth ion solubility and low phonon energy environment [1][2][3][4][5][6][7][8][9][10]. Low vibrational frequencies of these glasses allow enough non-radiative transitions from the excited states of dopant ions.…”

“…Literature indicates that the current interest of researchers on tellurite glasses is because of their optical characteristics such as high refractive index, broad IR transparency and low phonon energy [1][2][3][4][5][6][7][8][9][10][11]. Structural studies are ongoing, to shed light on the short range order of tellurite glasses, based on different combinations [10][11][12][13][14].…”

Nano-tribological characteristics of TiO2 films on 3-mercaptopropyl trimethoxysilane sulfonated self-assembled monolayer

“…Numerous studies have been conducted in order to understand the applications of TiO 2 in many fields such as optics, medicine, magnetics, tribology and so on (Sidebottom et al 1997;Konishi et al 1998;Yu et al 1998;Cheng and Bai 2006). A number of studies have been done on the nano-tribological properties of different SAMs (Cha and Kim 2001;Bhushan 2005), but the study of TiO 2 films on the nano-tribological behaviour is much lacking.…”