Zheng Xiaorui, Xu Bing, Li Shuo, Lin Han, Qiu Ling, Li Dan, Jia Baohua
Centre for Translational Atomaterials, Swinburne University of Technology, Hawthorn 3122, Australia.
University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Chemin du Musée 3, CH-1700 Fribourg, Switzerland.
Nanoscale. 2020 Jun 4;12(21):11480-11488. doi: 10.1039/d0nr01619e.
Mid-infrared (MIR) represents a crucial spectral region for applications in spectroscopy, sensing, imaging, security and industry screening, owing to the strong characteristic vibrational transitions of many important molecules. However, the current MIR compatible materials are fragile, hazardous, and costly, which hampers the performance of MIR devices. Here, we developed a versatile transmittance-based Kramers-Kronig method and obtained the optical properties of graphene oxide in the MIR region, unveiling its application potentials as a novel MIR compatible material. As an example, we demonstrated free-standing graphene oxide MIR polarizers with large extinction ratio (∼20 dB) and controllable working wavelength up to 25 μm, by using the low-cost and flexible direct laser writing technique. Our transmittance-based KK method offers a versatile approach to obtain the optical properties of novel atomic-scale low-dimensional materials in the less developed MIR region and opens up opportunities in high performing functional MIR devices.
由于许多重要分子具有强烈的特征振动跃迁，中红外（MIR）在光谱学、传感、成像、安全和工业筛选等应用中代表着一个关键的光谱区域。然而，目前与MIR兼容的材料易碎、有害且成本高昂，这阻碍了MIR器件的性能。在此，我们开发了一种基于透射率的通用克喇末-克朗尼格方法，并获得了氧化石墨烯在MIR区域的光学性质，揭示了其作为新型MIR兼容材料的应用潜力。例如，我们通过使用低成本且灵活的直接激光写入技术，展示了具有大消光比（约20 dB）且工作波长可控制至25μm的独立式氧化石墨烯MIR偏振器。我们基于透射率的KK方法提供了一种通用方法，用于在欠发达的MIR区域获得新型原子尺度低维材料的光学性质，并为高性能功能性MIR器件带来了机遇。
