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).
作者
袁志豪
徐俞
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)
出处
《激光与光电子学进展》
CSCD
北大核心
2020年第23期297-304,共8页
Laser & Optoelectronics Progress
基金
国家重点研发计划(2017YFB0404100)。
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
optical devices
light modulator
graphene
tunability
micro nano optics
infrared light
