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从姜黄中提取天然色素姜黄素:光谱、密度泛函理论、三阶非线性光学及光限幅研究

Extraction of Natural Pigment Curcumin from Curcuma Longa: Spectral, DFT, Third-order Nonlinear Optical and Optical Limiting Study.

作者信息

Deepa S, Madhu S, Devasenan S, Murali G, Pancharatna Pattath D, Maaza M, Kaviyarasu K, Jeyaram S

机构信息

Department of Chemistry, Takshashila University, Ongur (PO), Tindivanam, Villupuram ─ 604305, Tamilnadu, India.

Department of Physics, Takshashila University, Ongur (PO), Tindivanam, Villupuram ─ 604305, Tamilnadu, India.

出版信息

J Fluoresc. 2024 Jul;34(4):1885-1892. doi: 10.1007/s10895-023-03421-x. Epub 2023 Sep 4.

Abstract

Herein, we report the extraction of natural pigment curcumin from curcuma longa and their linear and third-order nonlinear optical (NLO) characteristics. The characterization techniques viz., UV-Visible absorption, FT-IR, Micro Raman and Gas Chromatography Mass Spectrum (GC-MS) are used to study the spectral characteristics of curcumin. Third-order NLO features of curcumin are studied using Z‒scan technique with a semiconductor diode laser working at 405 nm wavelength. The natural pigment exhibits negative nonlinear index of refraction resulting from self-defocusing and positive coefficient of absorption is the consequence of reverse saturable absorption (RSA). The order of nonlinear index of refraction (n) and nonlinear coefficient of absorption (β) is measured to be 10 cm/W and 10 cm/W, respectively. Third-order NLO susceptibility (χ) and second-order hyperpolarizability (γ) of curcumin is measured to be 2.73 × 10 esu and 1.67 × 10 esu, respectively. A low optical limiting (OL) threshold of 0.71 mW is observed in the extracted pigment. The experimental results are supplemented by quantum mechanical calculations of the NLO parameters. The overall result finding is that curcumin extracted from curcuma longa has the potential to be novel optical candidates for photonics and optoelectronics applications.

摘要

在此,我们报道了从姜黄中提取天然色素姜黄素及其线性和三阶非线性光学(NLO)特性。采用紫外可见吸收、傅里叶变换红外光谱(FT-IR)、显微拉曼光谱和气相色谱-质谱联用(GC-MS)等表征技术研究姜黄素的光谱特性。利用Z扫描技术,以波长为405 nm的半导体二极管激光器研究姜黄素的三阶NLO特性。该天然色素表现出由自散焦导致的负非线性折射率,而正吸收系数是反向饱和吸收(RSA)的结果。测得非线性折射率(n)和非线性吸收系数(β)的量级分别为10 cm/W和10 cm/W。测得姜黄素的三阶NLO极化率(χ)和二阶超极化率(γ)分别为2.73×10 esu和1.67×10 esu。在提取的色素中观察到低至0.71 mW的光学限幅(OL)阈值。NLO参数的量子力学计算对实验结果进行了补充。总体研究结果表明,从姜黄中提取的姜黄素具有成为光子学和光电子学应用中新型光学候选材料的潜力。

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