激光与光电子学进展, 2020, 57 (23): 232301, 网络出版: 2020-11-25
基于石墨烯等离子体的宽带透射式红外光调制器 下载: 973次
Broadband Transmission Infrared Light Modulator Based on Graphene Plasma
光学器件 光调制器 石墨烯 可调谐性 微纳光学 红外光 optical devices light modulator graphene tunability micro-nano optics infrared light
摘要
石墨烯作为一种特殊的二维材料,具有十分优异的物理性质,将石墨烯和微纳器件相结合已经成为当今的研究热点之一。在中红外到太赫兹波段,石墨烯可以激发表面等离子体,用于实现多功能可调谐器件。将石墨烯等离子体与硅基亚波长金属光栅相结合,提出了工作于红外波段的透射式宽带光调制器。通过施加偏置电压改变石墨烯的费米能级,实现在7~22 μm宽带内对透射光的调制,调制深度最高可以达到99.96%(33.77 dB)。
Abstract
Graphene is a special two-dimensional material, and has excellent physical properties. Combining graphene with micro-nano devices has become a hot research topic. In the mid-infrared to terahertz band, surface plasma can be excited in graphene, which can be applied to multi-functional tunable devices. In this paper, we propose a broadband light modulator working in the infrared waveband, which combines graphene plasma with silicon based subwavelength metallic gratings. By applying a bias voltage on graphene to change the Fermi level, the transmission light can be modulated within the wavelength range from 7 to 22 μm, and the modulation depth can reach up to 99.96% (33.77 dB).
袁志豪, 徐俞, 曹冰, 王钦华. 基于石墨烯等离子体的宽带透射式红外光调制器[J]. 激光与光电子学进展, 2020, 57(23): 232301. Zhihao Yuan, Yu Xu, Bing Cao, Qinhua Wang. Broadband Transmission Infrared Light Modulator Based on Graphene Plasma[J]. Laser & Optoelectronics Progress, 2020, 57(23): 232301.