用于非线性光学应用的高质量芘单晶的垂直布里奇曼生长和多面光学特性

IF 4.6 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Jithin Kuriakose , P. Karuppasamy , D. Joseph Daniel , P. Ramasamy
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引用次数: 0

摘要

采用垂直桥门技术(VBT)制备了高质量的芘单晶。采用单晶x射线衍射(SCXRD)和粉末x射线衍射(PXRD)技术对晶体结构进行了表征。高分辨率x射线衍射(HRXRD)研究表明,芘单晶具有优异的晶体质量,具有尖锐对称的摇摆曲线,半峰全宽窄(FWHM)为15.39弧秒。光学透射率测量表明,在500-1100 nm波长范围内,透明度超过85%,在400 nm波长范围内具有较低的截止值。测定光学带隙能量为3.08 eV。热分析,包括热重分析(TGA)和差热分析(DTA),揭示了熔点在154°C,并提供了对材料分解行为的见解。光致发光和x射线诱导发光分别在476nm、494nm和498nm处观察到发射峰。利用傅里叶变换红外光谱(FTIR)对晶体中的官能团进行了鉴定。通过z扫描技术分析了非线性光学性质,三阶非线性磁化率(χ3)为1.040 × 10−7 esu,非线性折射率(n2)为2.288 × 10−12 m2/W,非线性吸收系数(β)为2.517 × 10−4 m/W。这些发现表明,用Bridgman方法生长的芘单晶在非线性光学和高能(x射线)探测器中具有重要的应用潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Vertical bridgman growth and multifaceted optical characterization of high-quality pyrene single crystals for nonlinear optical applications
The high-quality pyrene single crystals were grown by the Vertical Bridgman Technique (VBT). The crystal structure was characterized using single-crystal X-ray diffraction (SCXRD) and powder X-ray diffraction (PXRD) techniques. High-resolution X-ray diffraction (HRXRD) studies of the pyrene single crystals demonstrated superior crystalline quality, with a sharp, symmetric rocking curve and a narrow full width at half maximum (FWHM) of 15.39 arcseconds. Optical transmittance measurements indicated over 85 % transparency in the 500–1100 nm wavelength range, with a lower cut-off at 400 nm. The optical band gap energy was determined to be 3.08 eV. Thermal analysis, including thermogravimetric analysis (TGA) and differential thermal analysis (DTA), revealed a melting point at 154 °C and provided insights into the material’s decomposition behaviour. Photoluminescence and X-ray induced luminescence were analyzed, and emission peaks were observed at 476 nm, 494 nm, and 498 nm, respectively. The functional groups present in the crystal were identified using Fourier Transform Infrared Spectroscopy (FTIR). Nonlinear optical properties were analyzed via the Z-scan technique, yielding values of 1.040 × 10−7 esu for the third-order nonlinear susceptibility (χ3), 2.288 × 10−12 m2/W for the nonlinear refractive index (n2), and 2.517 × 10−4 m/W for the nonlinear absorption coefficient (β).These findings suggest that pyrene single crystals grown by the Bridgman method have significant potential for applications in nonlinear optics and high-energy (X-ray) detectors.
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来源期刊
Materials Science and Engineering: B
Materials Science and Engineering: B 工程技术-材料科学:综合
CiteScore
5.60
自引率
2.80%
发文量
481
审稿时长
3.5 months
期刊介绍: The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.
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