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氢氧化铝的太赫兹特征峰及其增强技术

Terahertz Characteristic Peaks of Al(OH)3 and Techniques for Their Enhancement

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摘要

利用太赫兹时域光谱技术测量了氧化铝和氢氧化铝样品在0.5~1.5 THz范围内的太赫兹时域电场信号。对测量得到的时域信号进行了傅里叶变换,得到了样品信号与参考信号频域的振幅和相位信息。对比参考信号的频域谱发现,氢氧化铝在1.20 THz和1.33 THz处有明显的特征峰,而氧化铝与参考信号频域谱的特征峰相同。通过对石墨烯与氢氧化铝进行一定比例的掺杂,利用石墨烯表面等离激元的近场增强效应,增强了分子内羟基的共振伸缩,实现了对氢氧化铝特征峰的增强调控。这项研究不仅可以对氢氧化铝进行无损检测和有效识别,也可以利用石墨烯增加氢氧化铝的检测灵敏度,对进一步利用太赫兹时域光谱技术研究其他氢氧化物的光谱信息具有借鉴意义。

Abstract

We measured the terahertz time-domain electric fields of alumina and aluminum hydroxide samples in the range of 0.5-1.5 THz using terahertz time-domain spectroscopy. The frequency-domain spectra of sample and reference signals containing the amplitude and phase information were obtained by the fast Fourier transform of the measured time-domain signals. Compared with the frequency-domain spectrum of a reference signal, one can find that the aluminum hydroxide sample has obvious characteristic peaks at 1.20 THz and 1.33 THz; however, the alumina samples have the same characteristic peaks as the reference signal. The near-field enhancement via the surface plasmon polaritons of graphene was used to enhance resonant stretching of the hydroxyl groups in a molecule by doping a certain proportion of graphene and aluminum hydroxide, and thereby the enhanced regulation of characteristic peaks of aluminum hydroxide is achieved. This study not only offers effective nondestructive test and identification of aluminum hydroxide, but also increases the detection sensitivity of aluminum hydroxide using graphene. Moreover, it has reference significance for further study of spectral information for other hydroxides using terahertz time-domain spectroscopy.

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DOI:10.3788/LOP56.123001

所属栏目:光谱学

基金项目:国家自然科学基金;

收稿日期:2018-12-06

修改稿日期:2019-01-14

网络出版日期:2019-06-13

作者单位    点击查看

夏宇:上海理工大学光电信息与计算机工程学院, 上海 200093
李敏:上海理工大学光电信息与计算机工程学院, 上海 200093
袁帅:上海理工大学光电信息与计算机工程学院, 上海 200093
李振宇:上海理工大学光电信息与计算机工程学院, 上海 200093
贺明洋:上海理工大学光电信息与计算机工程学院, 上海 200093
卢文晖:上海理工大学光电信息与计算机工程学院, 上海 200093
王锋:上海理工大学光电信息与计算机工程学院, 上海 200093
曾和平:上海理工大学光电信息与计算机工程学院, 上海 200093

联系人作者:李敏(minli_1220@163.com)

备注:国家自然科学基金;

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引用该论文

Yu Xia,Min Li,Shuai Yuan,Zhenyu Li,Mingyang He,Wenhui Lu,Feng Wang,Heping Zeng. Terahertz Characteristic Peaks of Al(OH)3 and Techniques for Their Enhancement[J]. Laser & Optoelectronics Progress, 2019, 56(12): 123001

夏宇,李敏,袁帅,李振宇,贺明洋,卢文晖,王锋,曾和平. 氢氧化铝的太赫兹特征峰及其增强技术[J]. 激光与光电子学进展, 2019, 56(12): 123001

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