Quenching effects on crystallographic and optical properties of H : LiNbO₃layers

Abstract

The formation and decay of high temperature phases in HxLi1−xNbO3 waveguide layers have been studied by means of waveguide mode spectroscopy and x-ray rocking curve measuring. The hydrogen doped layers with x ∼ 0.47 in (001) LiNbO3 were created by proton exchange reaction in melt benzoic acid. The high temperature phases were frozen by quenching from T = 200°C. It has been shown that these phases possess a 9% higher refractive index and 16% lower deformation in reference to the characteristic of HxLi1−xNbO3 phase equilibrium at room conditions. The relaxation of the high temperature phase to the equilibrium one has been traced at T = 100°C.

Discovery of New Solid Solution Phosphors via Cation Substitution-Dependent Phase Transition in M3(PO4)2:Eu2+ (M = Ca/Sr/Ba) Quasi-Binary Sets

“…A conventional solid solution design strategy in phosphors is to prepare isostructural compounds; here, we propose another attempt: to prepare solid solutions within a phase transition boundary. In the solids, the crystal lattice becomes less rigid and bears more distortion around the vicinity of the phase transition; in addition to the generation of point defects, the abnormal critical behavior of physical properties, including structural, thermal, and optical parameters, is commonly observed, , related effects of which are found in many solution systems. − Interestingly, similar effects on the luminescence property can also be achieved, with the involvement of the internal pressure on the lattice induced by cation substitution. Such effect is supposed in M 3 (PO 4 ) 2 (M = Ca/Sr/Ba), and the aim of the present study is to study the structural and photoluminescence evolution of such quasi-binary sets.…”

Preparation and structural properties of nonlinear optical borates K2(1−x)Rb2xAl2B2O7, 0<x<0.75

“…However, to have a wide solid solution range without drastic defect generation and optical quality degradation, it is desirable for the end parent crystals to be isostructural [11][12][13][14][15]. As to KABO, a search for structural analogs was implemented in the past because the isovalent element substitution seems to be possible in * Corresponding author.…”

Structure and Optical Properties of K0.67Rb1.33Al2B2O7 Crystal

“…As we know, it is a useful strategy to modify the NLO properties of materials via doping with other ions [8][9][10][11][12][13][14][15]. For example, BaAlBO 3 F 2 doping with 50% Ga can increase its birefringence, and thus can change the shortest SHG wavelength from 273 nm to 259 nm and be used for the FOHG of Nd-based lasers [16].…”