Investigations of structural, dielectric and optical properties on silicon ion irradiated glycine monophosphate single crystals

The 50 MeV silicon ion irradiation induced modifications on structural, optical and dielectric properties of solution grown glycine monophosphate (GMP) crystals were studied. The high-resolution X-ray diffraction study shows the unaltered value of integrated intensity on irradiation. The dielectric constant as a function of frequency and temperature was studied. UV–visible studies reveal the decrease in bandgap values on irradiation and presence of F-centers. The fluorescence spectrum shows the existence of some energy levels, which remains unaffected after irradiation. The scanning electron micrographs reveal the defects formed on irradiation

Studies on the growth and characterization of L-asparaginium picrate (LASP) - A novel nonlinear optical crystal

Good quality single crystals of L-asparaginium picrate have been grown by a low-temperature solution growth technique. The UV-visible-NIR absorption spectra were recorded for the grown crystal and relative second harmonic generation (SHG) efficiency was investigated to explore the NLO characteristics of the material for the first time in the literature. The relative SHG efficiency of the material is 66.5 times greater than that of KDP and 10 times higher than that of urea. The dielectric and mechanical behavior of the specimen were also studied. The structural perfection of the grown crystals has been analyzed by high-resolution X-ray diffraction (HRXRD) rocking curve measurements. Fourier transform infrared ( FTIR) spectroscopic studies were also performed for the identification of different modes present in the compound

Synthesis, crystal growth and characterization of organic material: N-Bromosuccinimide (NBS) for NLO applications

The organic nonlinear optical crystal of N-Bromosuccinimide (NBS) was grown by slow cooling solution growth technique using methanol as solvent. Single crystal and powder X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectral analyses were carried out to confirm the NBS crystals. The ultra violet (UV)–Visible and photoluminescence spectral studies were carried out, the green band at 2.02 eV can be attributed to radiative recombination between deep donors and shallow acceptors. The second harmonic generation (SHG) behaviour of NBS was tested by Kurtz–Perry powder technique. The hardness behaviour, laser damage threshold and dielectric characteristics of NBS crystals were studied

Crystallization of benzimidazole by solution growth method and its characterization

The potential organic NLO crystal of benzimidazole (BMZ) has been successfully grown by slow evaporation solution growth technique at room temperature. The crystalline perfection has been verified by High resolution X-ray diffraction (HRXRD) analysis. The very low angle boundary obtained for this solution-grown specimen may be attributed to the segregation of solvent molecules (methanol), which were entrapped within the crystal during growth. The laser damage threshold has been measured by using high intensity Q-switched Nd:YAG laser. The observed value is greater than that of KDP and lesser than that of melt grown benzimidazole. The NLO efficiency has been determined and it is compared with the KDP crystal. The thermal behaviour has been assessed by TG/DTA analysis

On the observation of physical, chemical, optical and thermal changes induced by 50 MeV silicon ion in benzimidazole single crystals

The 50 MeV Si ion irradiation-induced modifications on structural, chemical, optical and thermal properties of Vertical Bridgman grown benzimidazole (BMZ) crystals have been studied. The FTIR studies have been used to analyze the variation in various bonds that are associated with the functional groups in the native and the irradiated sample. X-ray diffraction studies reveal the compressive strains that are generated due to irradiation. The effect of irradiation on the conductivity of BMZ crystals has been studied. The fluorescence spectrum shows the existence of some energy levels, which remains unaffected after irradiation. The thermal analysis reveals that the melting point remains unaffected and the sample does not decompose as a result of irradiation

Structural, dielectric and optical properties of N-(2 chlorophenyl)-(1-propanamide) (NCP) single crystals

Good transparent single crystals of N-(2 chlorophenyl)-(1-propanamide) have been grown by slow cooling solution growth technique. From the crystal structure analysis we infer that the crystal belongs to monoclinic system. The grown crystals were subjected to FT-IR and FT-Rarnan analyses for vibrational assignments, UV-Vis spectral studies for optical transmission and band gap determination, dielectric studies for the study of dependence of capacitance, dielectric constant, and conductivity with frequency and temperature and Laser damage threshold studie