【作者】 田雨； 王海龙； 徐抒平； 徐蔚青；

【Author】 TIAN Yu;WANG Hai-long;XU Shu-ping;XU Wei-qing;Key Laboratory for Supramolecular Structure and Materials of Ministry of Education,Jilin University;

【机构】 吉林大学超分子结构与材料国家重点实验室；

【摘要】 在亚波长尺度操纵光从而获得强局域电磁场是表面增强拉曼散射（SERS）研究中人们关注的重要问题。本研究分别探讨激发和发射过程对SERS增强的放大效应。以波导结构捕获入射光,在波导表面产生增强的消逝场作为激发过程,并以金属天线阵列的局域等离激元耦合发射过程。讨论了波导耦合尖锐锥状天线阵列结构的局域增强效果,该结构对4-巯基苯硼酸（4-MBA）的检测限可以达到1.0×10^-10mol·L^-1。这种波导耦合天线阵列的结构可用于检测几百纳米甚至微米尺寸的生物大分子。更多还原

【Abstract】 Manipulating light at the nanometer scale to obtain high intensity local electromagnetic fields is crucial issue for the researchers pursue for surface enhanced Raman scattering（SERS）.We considered both the excitation and emission ways to build SERS substrates.As for the excitation,the waveguide can capture the incident light and generate an enhanced evanescent field on the surface of waveguide.And the emission owe to the LSPR of antenna array.Waveguide-coupled tip-type antenna array was discussed.As the best enhancement of waveguide-coupled tip-type antenna array,the detection of 4-mercapto-benzoic acid was achieved with a limit down to 1.0×10^-10 mol·L^-1.The waveguide-coupled antenna array has great potential for label-free detection of biomacromolecules with large sizes as hundreds of nanometers or even micrometers.更多还原