%0 Journal Article
%T Design of Highly Sensitive Surface Plasmon Resonance Sensors Using Planar Metallic Films Closely Coupled to Nanogratings
%A YANG Xiao-Yan
%A XIE Wen-Chong
%A LIU De-Ming
%A <br>杨晓燕
%A 谢文冲
%A 刘德明
%J 中国物理快报
%D 2008
%I 
%X We investigate the sensitivity enhancement of surface plasmon resonance(SPR) sensors using planar metallic films closely coupled to nanogratings. The strong coupling between localized surface plasmon resonances (LSPRs) presenting in metallic nanostructures and surface plasmon polaritons (SPPs) propagating at the metallic film surface leads to changes of resonance reflection properties, resulting in enhanced sensitivity of SPR sensors. The effects of thickness of the metallic films, grating period and metal materials on the refractive index sensitivity of the device are investigated. The refractive index sensitivity of nanograting-based SPR sensors is predicted to be about543nm/RIU (refractive index unit) using optimized structure parameters. Our study on SPR sensors using planar metallic films closely coupled to nanogratings demonstrates the potential for significant improvement in refractive index sensitivity.
%K 42
%K 79
%K -e
%K 78
%K 20
%K Bh
%K 73
%K 20
%K Mf<br>高灵敏表面等离子体谐振传感器
%K 纳米格栅
%K 金属薄膜
%K 紧耦合
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=AFA8B4ECC200F7E517A5D85DDCABFECE&yid=67289AFF6305E306&vid=C5154311167311FE&iid=CA4FD0336C81A37A&sid=856C2E13D1000DB7&eid=70AC2EF7F2065E09&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=14