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<p>This research presents the synthesis of an organic single crystal infused with 2&#xa0;mol % thiourea in a 2:1 molar ratio of diglycine picrate (DGP) using the slow evaporation solution technique at ambient temperature. Single Crystal XRD evaluation confirmed the monoclinic crystal system with a centrosymmetric space group P2<sub>1</sub>/<sub>C</sub> and provided specific unit cell dimensions for the title crystal. Powder XRD further identified the miller indices (hkl) and crystalline planes of the crystal. A Vickers microhardness test indicated a hardness value of n (B = 0.26471), classifying it within the hard category. FTIR study revealed the existence of key functional groups. The title crystal exhibited broad optical transmittance of 95%, making it suitable for optoelectronic applications, as confirmed by UV–visible-NIR analysis. Thermal stability, assessed through TG/DTA analysis, revealed stability up to 240&#xa0;°C. Dielectric studies demonstrated frequency-dependent variations in both dielectric constant and loss. LDT analysis employing a Nd: YAG laser (λ = 1064&#xa0;nm) indicated a damage threshold of 3.54 GW/cm<sup>2</sup>. Third-order NLO characteristics were examined through Z-scan analysis, yielding a susceptibility of χ<sup>(3)</sup> = 1.1069 × 10<sup>−8</sup>esu.</p>

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Multi-faceted characterization of thiourea-doped diglycine picrate (DGP) single crystals for advanced nonlinear optical applications

  • 期刊论文

  • 发表日期：

    2025年1月5日

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  • R. Suganthi,
  • K. Balasubramanian

摘要

This research presents the synthesis of an organic single crystal infused with 2 mol % thiourea in a 2:1 molar ratio of diglycine picrate (DGP) using the slow evaporation solution technique at ambient temperature. Single Crystal XRD evaluation confirmed the monoclinic crystal system with a centrosymmetric space group P21/C and provided specific unit cell dimensions for the title crystal. Powder XRD further identified the miller indices (hkl) and crystalline planes of the crystal. A Vickers microhardness test indicated a hardness value of n (B = 0.26471), classifying it within the hard category. FTIR study revealed the existence of key functional groups. The title crystal exhibited broad optical transmittance of 95%, making it suitable for optoelectronic applications, as confirmed by UV–visible-NIR analysis. Thermal stability, assessed through TG/DTA analysis, revealed stability up to 240 °C. Dielectric studies demonstrated frequency-dependent variations in both dielectric constant and loss. LDT analysis employing a Nd: YAG laser (λ = 1064 nm) indicated a damage threshold of 3.54 GW/cm2. Third-order NLO characteristics were examined through Z-scan analysis, yielding a susceptibility of χ(3) = 1.1069 × 10−8esu.