Li Jitao, Jiang Mingming, Xu Chunxiang, Wang Yueyue, Lin Yi, Lu Junfeng, Shi Zengliang
1] State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China [2] School of Physics and Electromechanical Engineering, Zhoukou Normal University, Zhoukou 466001, China.
State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
Sci Rep. 2015 Mar 19;5:9263. doi: 10.1038/srep09263.
The response of graphene surface plasmon (SP) in the ultraviolet (UV) region and the realization of short-wavelength semiconductor lasers not only are two hot research areas of great academic and practical significance, but also are two important issues lacked of good understanding. In this work, a hybrid Fabry-Perot (F-P) microcavity, comprising of monolayer graphene covered ZnO microbelt, was constructed to investigate the fundamental physics of graphene SP and the functional extension of ZnO UV lasing. Through the coupling between graphene SP modes and conventional optical microcavity modes of ZnO, improved F-P lasing performance was realized, including the lowered lasing threshold, the improved lasing quality and the remarkably enhanced lasing intensity. The underlying mechanism of the improved lasing performance was proposed based on theoretical simulation and experimental characterization. The results are helpful to design new types of optic and photoelectronic devices based on SP coupling in graphene/semiconductor hybrid structures.
石墨烯表面等离子体（SP）在紫外（UV）区域的响应以及短波长半导体激光器的实现，不仅是两个具有重大学术和实际意义的热门研究领域，也是两个尚未得到充分理解的重要问题。在这项工作中，构建了一种由单层石墨烯覆盖的ZnO微带组成的混合法布里 - 珀罗（F - P）微腔，以研究石墨烯SP的基本物理特性以及ZnO紫外激光的功能扩展。通过石墨烯SP模式与ZnO传统光学微腔模式之间的耦合，实现了改进的F - P激光性能，包括降低的激光阈值、提高的激光质量和显著增强的激光强度。基于理论模拟和实验表征，提出了激光性能改善的潜在机制。这些结果有助于设计基于石墨烯/半导体混合结构中SP耦合的新型光学和光电器件。
