Linear and nonlinear optical analysis on semiorganic L -proline cadmium chloride single crystal

Muley

Materials Science-Poland

et al. 2018

Self Cite

Present investigation is aimed to explore the single crystal growth, microhardness and third order nonlinear optical (TONLO) properties of Nd3+ doped zinc tris-thiourea sulphate (ZTS) crystal. The commercial slow solvent evaporation technique has been chosen to grow a good quality ZTS (12 mm × 0.5 mm × 0.3 mm) and Nd3+ doped ZTS (11 mm × 0.6 mm × 0.4 mm) single crystals. Vickers microhardness test has been employed to analyze the influence of Nd3+ dopant on the hardness behavior of ZTS single crystal. The TONLO effects occurring in Nd3+ doped ZTS single crystal have been evaluated by means of Z-scan technique using a He–Ne laser operating at 632.8 nm. The close and open aperture Z-scan configuration have been used to determine the nature of TONLO refraction n2 and absorption β, respectively. The magnitudes of vital TONLO parameters, such as refraction n2, absorption coefficient β, figure of merit and susceptibility χ3 of the Nd3+ doped ZTS single crystal, have been determined using Z-scan transmittance data. The n2, β, and χ3 of Nd3+ doped ZTS single crystal were found to be of the order of 10−10 cm2/W, 10−6cm/W and 10−5 esu, respectively.

Section: Resultssupporting

confidence: 68%

Comparative analysis on microhardness and third order nonlinear optical traits of pure and Nd³⁺ doped zinc tris-thiourea sulphate (ZTS) crystal

Muley

Materials Science-Poland

et al. 2018

Self Cite

“…As it is noted from the table 1, the values of the n 2 and ( ) c 3 of the EBT/PVA film are of the same order or even greater than their values for the materials mentioned in [35,37,38,[72][73][74][75][76][77][78][79], which proves that the n 2 and ( ) c 3 values obtained for the EBT/PVA film are good values. Also, the value of the nonlinear index of refraction of the sample calculated by the Z-scan method is higher than the values mentioned in the studies [80][81][82][83][84][85][86] that used the same technique, which makes the EBT/PVA film a promising candidate for the use in photon applications especially as an optical limiter for the cw low power laser beam due to the occurrence of the phenomenon of self-defocusing of the laser beam when it passes through the sample, as it was observed in Z-scan experiment. As we know that the self-defocusing of a laser beam is one of the mechanisms that cause the sample to behave like an optical limiter.…”

Section: Comparative Studycontrasting

confidence: 67%

Characterizing optical and morphological properties of Eriochrome Black T doped polyvinyl alcohol film

et al. 2020

Eriochrome Black T doped polyvinyl alcohol film was prepared on a glass substrate via the casting method. Optical microscope image of the film was taken by an optical microscope and analyzed by an Image J and origin 2008 software where it was proved that the film was free of defects and holes and uniformly distributed over entire area of the substrate. The optical constants of the film were calculated via the optical absorbance and transmittance in the wavelength range 350–900 nm via the use of a set of known mathematical formulas together with Wemple and DiDomenico model. The optical conductivity and the electrical conductivity of the prepared film in response to external electric filed are obtained using two more equations where it was found that the prepared film have high optical conductivity of the order of 1012 s−1 and an electrical conductivity of the order of 104 (S cm−1).

Materials Science-Poland

“…Some of important transitions with increasing energies are: non-bonding to pie * , non-bonding to sigma * , pie to pie * , sigma to pie * and sigma to sigma * . This UV-Vis spectral studies help to analyse the factors connected with a crystal such as anisotropy in molecular alignment, crystal defects (voids, vacancies, grain boundaries, striations, pits, solvent impurities, inclusions) by measuring the intensity of optical transmittance [32]. [12]; #previously reported KDP [19].…”

Section: Uv-vis Spectral Analysismentioning

confidence: 99%

“…From SHG test, the SHG efficiency of the synthesized SPH crystal was found to be almost 1.7 times more than that of the reference KDP. The enhancement of SHG efficiency results from (i) an incresease in electron phonon interactions by structural disordering in a crystal that leads to the formation of a sub-energy bands below the energy gap and thus facilitates the favorable surroundings for photoinduced nonlinear optical effects to dwell efficiently and (ii) the enhanced charge transfer induced by the metal-organic coordination [32,33].…”

Section: Nlo Studiesmentioning

confidence: 99%

Growth and study of 4-sulfobenzenaminium potassium dihydrogenphosphate for mechanical, dielectric and photonics applications

Vinoth¹,

Vetrivel²,

Gopinath³

et al. 2020

This article describes the growth and characterization of 4-sulfobenzenaminium potassium hydrogen phosphate (SPH) sulphanilic acid with potassium dihydrogen phosphate (KDP) doped semi-organic single crystals. The crystal was grown by the slow evaporation method. Examination of the crystalline nature of the sample was carried out by single crystal X-ray diffraction and it confirmed that the sample crystallizes in orthorhombic structure in the centrosymmetric space group P212121. The optical transmittance behavior was tested by UV-Vis spectral analysis. FT-IR spectral investigations have been carried out to indicate the presence of functional groups. The chemical structure of the compound was established by 1H and 13C NMR spectra. The SHG efficiency of the powdered SPH crystal is around 1.7 times that of pure KDP. The grown crystal was stable up to 270 °C as observed from TGA and DTA curves. The microhardness test was carried out to study the load dependency of hardness. The result of this study indicates that SPH crystal is a malleable material. From the hardness values, the stiffness constant and yield strength were calculated. The dielectric response of the novel crystal was studied in the frequency range of 50 Hz to 5 MHz at various temperatures. By employing FE-SEM, the surface morphology and the particle size of the crystal were assessed.