Impact of incorporated anatase nanoparticles on the second harmonic generation in KDP single crystals

Abstract

The second harmonic generation efficiency was studied for the single crystalline potassium dihydrogen phosphate matrix with incorporated TiO2 nanocrystals in the field of the mode-locked Nd:YAG laser pulses. For the first time the frequency conversion efficiency gain was observed for KDP:TiO2 single crystal (SC) instead of KDP SC due to the internal self-focusing effect of the pump beam caused by the giant cubic nonlinear optical response of the embedded nanoparticles.

Structural and mechanical properties of KН2PО4 single crystals with embedded nanoparticles and organic molecules

“…in laser fusion facilities . However, one of the main shortcomings of KDP crystals is their relatively low quadratic susceptibility . Another limiting factor in the use of KDP in third harmonic generation is its susceptibility to laser damage, a process that couples light absorption with thermal and mechanical effects .…”

“…A promising trend in the development of up‐to‐date functional optical materials based on dielectrics is incorporation of tailoring impurities into the crystalline matrixes of traditional nonlinear optical materials . Thus, search for nonlinear optical media possessing high conversion efficiency of laser radiation stimulated creation of composite materials based on KDP dielectric matrix doped with organic molecules or nanoparticles (NPs) . These studies were aimed at correlating the structural properties to the nonlinear responses, the ultimate goal being the possibility of “tuning” the structure to enhance the NLO properties.…”

“…As found in while studying the structure perfection of KDP crystals containing SiO 2 and CdTe nanoparticles, such crystals are able to capture from 2 to 250 nm particles. Incorporation of titanium dioxide NPs into KDP matrix was shown to raise the frequency conversion efficiency in KDP:TiO 2 composite system by ∼70% versus pure KDP crystal in picosecond range of laser pulses . The structure–mechanical function relations were studied for different mineralized biological materials .…”

Some characteristic features of formation of composite material based on KDP single crystal with incorporated Al2O3·nH2O nanoparticles

“…The incorporation of titanium dioxide nanoparticles (anatase) into KDP crystal matrix has been shown to enhance the efficiency of second harmonic generation in KDP:TiO 2 up to 70% in comparison with pure KDP . The observed effect is caused by the interaction between the quadratic nonlinear optical response of the matrix and the cubic nonlinear optical response of TiO 2 nanoparticles . However, the peculiarities of the inherent structure of these composite systems, their optical properties and the effects, which characterize such materials in the capacity of optical medium, have not been investigated in detail so far.…”

GROWTH AND CHARACTERIZATION OF CdS DOPED KDP SINGLE CRYSTALS

“…KCl, oxalic acid, Al 2 O 3 , amaranth, rhodamine B, methyl orange, Lglutamic acid, L-histidine, L-valine [8][9][10][11]. Recently, the effect of TiO 2 (prepared as nanoparticles) on the functional properties of KDP single crystals have been studied [12][13][14][15][16]. It has been reported that the composite system KDP:TiO 2 has giant nonlinear optical response.…”