基于石墨烯的太赫兹光电功能器件研究进展

Recent progress on graphene-based terahertz optoelectronics

摘要:

作为一种新型光电材料，石墨烯独特的能带结构和电子输运特性，使其与太赫兹科学有着密切的内在关系：石墨烯内部的等离子体振荡频率在太赫兹频段；人为调谐石墨烯的禁带宽度在0~0.3 eV时，正好覆盖太赫兹频段；光电导率的外部可控性等，这些特点使得石墨烯有望成为太赫兹频段新一代高性能设备研制的基础。最近的研究显示，石墨烯在太赫兹波产生、调控、检测等光电功能器件的研制中取得了很好的成果。重点介绍了基于石墨烯的太赫兹光电功能器件，包括太赫兹源器件、可控调控器件及检测器研究的最新进展，并对这一快速发展的研究领域进行了展望。

Abstract:

As a new kind of optoelectronic material, based on its unique band structures and electron transport properties, graphene is closely related to terahertz(THz) science: both its variable plasmon resonance and tunable bandgaps(0-0.3 eV) include the THz frequency band; its tunable optical conductivity; etc.. These properties have made graphene a potential candidate for the fabrication of new generation high-quality THz devices. Recently, researchers have made great progress in THz generation, manipulation, and detection based on graphene. In this paper, an introduction to the recent progress in graphene-based THz optoelectronics, including THz sources, tunable manipulation devices, and detectors, is given, and the prospects of this fast-developing field are also discussed.