Growth and Evaluation of Linear Optical, Nonlinear Optical, Thermal, Mechanical and Magnetic Properties of Lithium Sodium Sulfate Single Crystals

Abstract

In recent years, nonlinear optical materials have received attention due to their potential applications in photonics and opto‐electronics. In this pursuit, lithium sodium sulfate (LSS) single crystals are synthesized by adopting a slow evaporation technique at constant temperature (40 °C). The single‐crystal X‐ray diffractometer (XRD) study confirms that the grown LSS belongs to trigonal symmetry with the lattice parameters a = b = 8.452 Å, and c = 30.27 Å. The crystalline nature and purity of LSS are confirmed by the powder XRD technique. The lower cutoff wavelength and optical bandgap of the grown crystal are determined using transmission spectra and found to be 335 nm and 3.5 eV, respectively. The photoluminescence spectrum of the crystal shows the strong blue/green emission at 510 nm, which explains the second harmonic generation (SHG) property. The SHG efficiency is confirmed by the Kurtz and Perry powder method and the SHG efficiency of LSS is 1.09 times greater than that of pottasium dihydrogen phosphate (KDP). Thermal parameters of the titled material are calculated using a thermogravimetric (TG)/differential thermal analysis (DTA) analyzer. Microhardness studies and the diamagnetic nature of LSS are carried out using a Vicker's hardness tester and a vibration sample magnetometer.

Deep-ultraviolet transparent alkali metal–rare earth metal sulfate NaY(SO4)2·H2O as a nonlinear optical crystal: synthesis and characterization

“…37,38 Compared with [PO 4 ] tetrahedra, [SO 4 ] tetrahedra can also be considered as functional anionic groups in searching for NLO materials particularly working in the short-wave UV region. [39][40][41][42] 39 and (NH 4 ) 2 Na 3 Li 9 (SO 4 ) 7 , 39 have been reported. To further enhance the NLO properties of sulfates, cations with a stereochemically active lone-pair (SALP, e.g., Sb 2+ , Bi 3+ , etc.)…”

K2S4O6: improving birefringence and nonlinear optical properties with the [O3S–S–S–SO3]2− group

“…Unfortunately, most of them show a small SHG response (<0.5 × KDP). Only LiNaSO 4 , 13 LiKSO 4 , 14 NH 4 NaLi 2 (SO 4 ) 2 15 and Li 9 Na 3 Rb 2 (SO 4 ) 7 16 show a moderate SHG effect that are comparable to that of KDP. Besides the relatively small SHG effect, the SO 4 tetrahedron is considered to be disadvantageous to induce large birefringence due to the isotropy of its structure.…”

Li2.9Cs1.1(SO4)2: An Ultraviolet Transparent Sulfate as a Nonlinear Optical Crystal

“…These sharpness endothermic peaks indicate that LCSO has good degree of crystallinity (Figure S4). 58 NLO Property. Through the Kurtz−Perry method, 59 we measured the SHG performance of LCSO.…”