基于陷模的全介质石墨烯超表面在超敏生物检测中的应用  

Ultra-sensitive Bio-sensor Based on Trapped Mode All-dielectric Metasurface Coating with Graphene Layer

作　　者：邓学松 方明 任信钢[1,2,3] 黄志祥 吴先良[1,3] DENG Xue-song;FANG Ming;REN Xin-gang;HUANG Zhi-xiang;WU Xian-liang(Key Laboratory of Intelligent Computing and Signal Processing,Ministry of Education,Anhui University,Hefei 230601,China;Institute of Physical Science and Information Technology,Anhui University,Hefei 230601,China;Key Laboratory of Electromagnetic Environmental Sensing,Department of Education of Anhui Province,Anhui University,Hefei 230601,China)

机构地区：[1]安徽大学计算智能与信号处理教育部重点实验室,合肥230601 [2]安徽大学物质科学与信息技术研究院,合肥230601 [3]安徽大学电磁环境感知安徽省教育厅重点实验室,合肥230601

出　　处：《光子学报》2019年第12期30-39,共10页Acta Photonica Sinica

基　　金：国家自然科学基金(Nos.61701003,61871001,61701001,61901001),国家自然科学基金优秀青年科学基金(No.61722101);安徽省自然科学研究基金(Nos.1908085QF259,1808085QF179);安徽省教育厅重点项目(No.K120136026)~~

摘　　要：提出了一种由亚波长硅粒子组成的全介质超表面,在硅粒子中引入适当的缺陷从而破坏结构的对称性,进而使超表面能够激发出陷波模态.将石墨烯与全介质超表面相结合进行DNA和RNA等核酸物质传感检测,对比透射光谱中的谐振模式,发现所设计的超表面能够灵敏的感知周围环境的微弱变化,其在传感检测时的灵敏度可以达到173 nm/RIU,相应的品质因数可达14416 RIU-1,具有优异的生物传感性能.全介质超表面是实现超灵敏生物传感检测的一种有效的途径.It has proposed an all-dielectric metasurface consisting of subwavelength particles,which supports“trapped”mode after the introduction of properly symmetry-breaking in the silicon meta-atoms.Combining the monolayer graphene with all-dielectric metasurface that enables to detect nucleic acids such as DNA and RNA.it has been found that the proposed metasurface is ultra-sensitive to the surrounding environment,its sensitivity in sensing detection can be up to 173 nm/RIU,with the corresponding quality factor of 14416 RIU-1,which exhibits excellent biosensing performance by comparing the resonant state in the transmission spectrum.It indicates all-dielectric metasurfaces could be a promising way and platform to realize ultra-sensitive bio-sensors.

关 键 词：超表面 生物传感器 石墨烯 纳米光子学 肿瘤标志物 

分 类 号：O431.1[机械工程—光学工程] O433.4[理学—光学]