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<p>A nonlinear optical (NLO) inorganic single crystal sodium molybdate dihydrate (SMDH) was grown by utilizing a slow evaporation solution growth technique processed at an ambient room temperature formed from an ethanol solution. To ensure the crystal’s application, a number of characterizations were performed. According to the single crystal XRD, the SMDH crystal belongs to centrosymmetric orthorhombic crystal system with unit cell dimensions <i>a</i> = 8.4758&#xa0;Å, <i>b</i> = 10.5588&#xa0;Å, <i>c</i> = 13.8214&#xa0;Å it axial angles were <i>α</i> = <i>β</i> = <i>γ</i> = 90°. The FTIR studies have been used to characterize the various functional groups associated with the grown crystal. The grown SMDH crystal is completely transparent in the whole visible region. And from the graphs the lower cut off wavelength of 380&#xa0;nm and bandgap of 3.26&#xa0;eV is obtained by UV–Vis-NIR spectroscopy. The dielectric parameters were analyzed. The thermally stability of the SMDH crystal were obtained upto 100&#xa0;°C. The high Laser Damage Threshold value of 4.045 GWcm<sup>−2</sup> was obtained. The various nonlinear optical parameters were studied by Z-scan technique with a continuous pump laser of 532&#xa0;nm. Reverse saturable absorption is absorbed from the positive value of the nonlinear absorption coefficient (2.3017 × 10<sup>–4</sup>&#xa0;cm/W), the SMDH material has a negative refractive index value of −&#xa0;2.3353 × 10<sup>–7</sup> cm<sup>2</sup>/W that shows self-defocusing nature, and the material has a higher third-order susceptibility (2.6941 × 10<sup>–28</sup> esu). The results of the above characterization suggest that the SMDH single crystal is a suitable candidate for optoelectronic and photonic device fabrication.</p>

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Growth and properties characterization of sodium molybdate dihydrate single crystal for NLO device application

  • 期刊论文

  • 发表日期：

    2025年4月2日

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  • G. P. Sangeetha,
  • G. V. Vijayaraghavan,
  • J. Priscilla

摘要

A nonlinear optical (NLO) inorganic single crystal sodium molybdate dihydrate (SMDH) was grown by utilizing a slow evaporation solution growth technique processed at an ambient room temperature formed from an ethanol solution. To ensure the crystal’s application, a number of characterizations were performed. According to the single crystal XRD, the SMDH crystal belongs to centrosymmetric orthorhombic crystal system with unit cell dimensions a = 8.4758 Å, b = 10.5588 Å, c = 13.8214 Å it axial angles were α = β = γ = 90°. The FTIR studies have been used to characterize the various functional groups associated with the grown crystal. The grown SMDH crystal is completely transparent in the whole visible region. And from the graphs the lower cut off wavelength of 380 nm and bandgap of 3.26 eV is obtained by UV–Vis-NIR spectroscopy. The dielectric parameters were analyzed. The thermally stability of the SMDH crystal were obtained upto 100 °C. The high Laser Damage Threshold value of 4.045 GWcm−2 was obtained. The various nonlinear optical parameters were studied by Z-scan technique with a continuous pump laser of 532 nm. Reverse saturable absorption is absorbed from the positive value of the nonlinear absorption coefficient (2.3017 × 10–4 cm/W), the SMDH material has a negative refractive index value of − 2.3353 × 10–7 cm2/W that shows self-defocusing nature, and the material has a higher third-order susceptibility (2.6941 × 10–28 esu). The results of the above characterization suggest that the SMDH single crystal is a suitable candidate for optoelectronic and photonic device fabrication.