Scholarlink

<p>Crystallography forms a fundamental aspect of optical science, offering valuable insights into the structural, optical, and mechanical behavior of crystalline materials. In the present study, high-quality single crystals of L-methionine ammonium ferrous sulfate (LMAFS) were successfully synthesized by the slow evaporation method from an equimolar aqueous solution. Single-crystal X-ray diffraction analysis revealed that the compound crystallizes in a monoclinic crystal system. The optical transmittance spectrum exhibited excellent transparency in the visible region, with a sharp absorption edge at 306&#xa0;nm, corresponding to an optical bandgap of 4.18&#xa0;eV. From the UV–visible absorption data, key optical parameters such as the Urbach energy, extinction coefficient, and reflectance were determined. The photoluminescence (PL) spectrum provided insights into the emission characteristics of the material. Mechanical stability was evaluated through Vicker’s microhardness measurements, from which the hardness number, work hardening coefficient, yield strength, and elastic stiffness constant were derived. Fourier-transform infrared (FTIR) spectroscopy confirmed the presence of functional groups corresponding to the constituent molecular units, while energy-dispersive X-ray spectroscopy (EDAX) verified the expected elemental composition. Scanning electron microscopy (SEM) images revealed a uniform surface morphology with well-developed facets, indicative of stable crystal growth. Dielectric measurements over a range of frequencies showed a strong dependence of dielectric loss on the applied electric field. The laser damage threshold, determined using a Nd:YAG laser, was found to be 16.76 GW/cm<sup>2</sup>, confirming the excellent laser durability of the crystal. The second-harmonic generation (SHG) efficiency was measured to be 1.65 times that of potassium dihydrogen phosphate (KDP), demonstrating a strong nonlinear optical (NLO) response. Furthermore, open-aperture Z-scan analysis under nanosecond pulse excitation revealed pronounced nonlinear absorption and optical-limiting behavior, establishing the potential of the LMAFS crystal for advanced photonic and optoelectronic device applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Synthesis and comprehensive characterization of L-methionine ammonium ferrous sulfate (LMAFS) single crystals for nonlinear optical applications

  • 期刊论文

  • 发表日期：

    2026年1月10日

查看全文
  • M. Meena,
  • M. Shalini,
  • R. Natarajan

摘要

Crystallography forms a fundamental aspect of optical science, offering valuable insights into the structural, optical, and mechanical behavior of crystalline materials. In the present study, high-quality single crystals of L-methionine ammonium ferrous sulfate (LMAFS) were successfully synthesized by the slow evaporation method from an equimolar aqueous solution. Single-crystal X-ray diffraction analysis revealed that the compound crystallizes in a monoclinic crystal system. The optical transmittance spectrum exhibited excellent transparency in the visible region, with a sharp absorption edge at 306 nm, corresponding to an optical bandgap of 4.18 eV. From the UV–visible absorption data, key optical parameters such as the Urbach energy, extinction coefficient, and reflectance were determined. The photoluminescence (PL) spectrum provided insights into the emission characteristics of the material. Mechanical stability was evaluated through Vicker’s microhardness measurements, from which the hardness number, work hardening coefficient, yield strength, and elastic stiffness constant were derived. Fourier-transform infrared (FTIR) spectroscopy confirmed the presence of functional groups corresponding to the constituent molecular units, while energy-dispersive X-ray spectroscopy (EDAX) verified the expected elemental composition. Scanning electron microscopy (SEM) images revealed a uniform surface morphology with well-developed facets, indicative of stable crystal growth. Dielectric measurements over a range of frequencies showed a strong dependence of dielectric loss on the applied electric field. The laser damage threshold, determined using a Nd:YAG laser, was found to be 16.76 GW/cm2, confirming the excellent laser durability of the crystal. The second-harmonic generation (SHG) efficiency was measured to be 1.65 times that of potassium dihydrogen phosphate (KDP), demonstrating a strong nonlinear optical (NLO) response. Furthermore, open-aperture Z-scan analysis under nanosecond pulse excitation revealed pronounced nonlinear absorption and optical-limiting behavior, establishing the potential of the LMAFS crystal for advanced photonic and optoelectronic device applications.