棕树叶的形貌、成分及光谱特性研究∗

摘要

Terahertz (THz) spectra for different palm leaves are measured by Fourier transformed infrared spectroscopy-attenuated total reflection, and the physical morphologies and chemical compositions of the leaves are characterized by scanning electron microscopy and infrared spectroscopy, respectively. Accordingly, the THz fingerprint peaks of chlorophyll and carotenoid are experimentally identified. In addition, the results indicate that the influence of the chemical composition in plant leave on optical response is significantly stronger than that of the physical morphology. Moreover, among the main chemical components of palm leave, the THz response of chlorophyll is stronger than that of carotenoid. In this work, new methods of investigating the optical properties of the planes and of developing novel THz sensitive organic materials are also proposed. Particularly, some important results are reported for the first time in this article. These valuable results will be helpful not only for an in-depth understanding of the physiological behavior of the plants, but also for the obtaining of inspiration for designing functional materials of device with higher performance, higher pertinency and wider applications, and thus promoting the development of related theories and applications.%利用傅里叶红外光谱仪-衰减全反射技术对不同棕树叶的太赫兹光谱进行了测量，利用扫描电子显微镜及中红外光谱表征了样品的物理形貌与化学成分。给出了叶绿素及类胡萝卜素的太赫兹指纹谱峰，发现植物叶子的化学成分对光学响应的影响强于其物理形貌的影响。在棕树叶的主要化学成分中，叶绿素的太赫兹响应强于类胡萝卜素。提出了植物光学研究以及太赫兹有机敏感材料研究的新方法，获得了一些重要结果。研究结果不仅有助于人们更加深入地了解植物的一些生理行为，并可以从中得到启发，为设计性能更高、针对性更强、应用更广的器件功能材料创造条件，推动理论及应用研究的发展。