相关实验视频

Updated: Jun 24, 2025

Fabrication and Characterization of Disordered Polymer Optical Fibers for Transverse Anderson Localization of Light

Fabrication and Characterization of Disordered Polymer Optical Fibers for Transverse Anderson Localization of Light

Published on: July 29, 2013

对染料染的非线性光学聚合物的吸收边缘进行了全面分析

Weilong Chen^1,2, Di Zhang^1,2,3, Jie Zou^1,2

¹Department of Chemistry, City University of Hong Kong, Hong Kong SAR, 999077, China.

|June 7, 2024

概括

本研究使用修改的陶克-洛伦茨模型来分析有机非线性光学 (NLO) 聚合物,确定它们的光学带隙和Urbach能量. 这项研究提供了通过控制带边附近的光学损失来优化NLO材料的见解.

科学领域:

材料科学材料科学材料科学
光学是什么?光学是什么?光学是什么?
聚合物科学聚合物科学

背景情况:

修改的陶克 - 洛伦茨模型对于光学带隙和各种材料的乌尔巴赫能量的确定至关重要.
这些模型尚未广泛应用于有机非线性光学 (NLO) 材料.
了解NLO材料的光学特性是先进光学应用的关键.

研究的目的:

适应和应用修改的陶克-洛伦茨模型来分析有机NLO聚合物.
为了研究客宿主NLO聚合物薄膜中的光学吸收边缘和相关参数.
分析光学带隙和Urbach边缘对材料结构和组成的依赖.

主要方法:

制备高质量的客房主机NLO聚合物薄膜,其厚度范围广泛 (微米至200微米).
使用UV-VIS-NIR光谱在四个数量级上测量全光谱吸收系数.
应用Tauc模型和一个新的Monolog-Lorentz模型来研究光学吸收边缘.

主要成果:

在有机NLO聚合物中精确确定光学带隙和Urbach能量.
从乌尔巴赫指数尾到低能尾的过渡分析,在电信波长上重叠着振动的共振.
材料结构/组成和光学带隙/Urbach边缘之间的相关性被确定.

结论:

该研究成功地将修改后的陶克-洛伦茨模型的应用扩展到有机NLO材料.
确定基本吸收区域为利用共振增强的非线性系数提供了定量见解.
控制带边附近的光学损失对于优化特定波长的NLO材料性能至关重要.

关键词:

单音 - 洛伦茨 (ML) 模型模型陶克的方法方法.有光学损失.有机电光材料是有机电光材料.这是一种振动的超音调.

更多相关视频

A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles

A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles

Published on: November 14, 2015

Advanced Compositional Analysis of Nanoparticle-polymer Composites Using Direct Fluorescence Imaging

Advanced Compositional Analysis of Nanoparticle-polymer Composites Using Direct Fluorescence Imaging

Published on: July 19, 2016

相关概念视频

UV–Vis Spectroscopy of Conjugated Systems

UV–Vis Spectroscopy of Conjugated Systems

Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent...

Molecular Spectroscopy: Absorption and Emission

Molecular Spectroscopy: Absorption and Emission

Molecules possess discrete energy levels called quantum states. Unlike atoms, which have simpler energy levels, molecules possess additional rotational and vibrational energy levels. Each energy level is separated by an energy gap, with the gaps between adjacent electronic, vibrational, and rotational levels varying significantly. The three types of energy levels in a diatomic molecule are shown in Figure 1.

UV–Vis Spectroscopy: Woodward–Fieser Rules

UV–Vis Spectroscopy: Woodward–Fieser Rules

UV–Visible absorption spectra of conjugated dienes arise from the lowest energy π → π* transitions. The light-absorbing part of the molecule is called the chromophore, and the substituents directly attached to the chromophore are called auxochromes. A strong correlation exists between the absorption maxima, λmax, and the structure of a conjugated π system. The Woodward–Fieser rules predict the value of λmax for a given...