基于石墨烯等离子体的宽带透射式红外光调制器  

Broadband Transmission Infrared Light Modulator Based on Graphene Plasma

作　　者：袁志豪 徐俞[3] 曹冰 王钦华 Yuan Zhihao;Xu Yu;Cao Bing;Wang Qinhua(School of Optoelectronic Science and Engineering,Soochow University,Suzhou,Jiangsu 215006,China;Key Lab of Modern Optical Technologies of Education Ministry of China,Key Lab of Adoanced Optical Manufacturing Technologies of Jiangsu Province,Suzhou,Jiangsu 215006,China;Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou,Jiangsu 215123,China)

机构地区：[1]苏州大学光电科学与工程学院,江苏苏州215006 [2]教育部现代光学技术重点实验室,江苏省先进光学制造技术重点实验室,江苏苏州215006 [3]中国科学院苏州纳米技术与纳米仿生研究所,江苏苏州215123

出　　处：《激光与光电子学进展》2020年第23期297-304,共8页Laser & Optoelectronics Progress

基　　金：国家重点研发计划(2017YFB0404100)。

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7~22μm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)。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 22μm,and the modulation depth can reach up to 99.96%(33.77 dB).

关 键 词：光学器件 光调制器 石墨烯 可调谐性 微纳光学 红外光 

分 类 号：O436[机械工程—光学工程]