Resonant Effects of FPL and SPP for Light Transmitting through Subwavelength Metallic Gratings  

作　　者：马佑桥 周骏 何苗 L.Petti P.Mormile 

机构地区：[1]Department of Physics,Faculty of Science,Ningbo University [2]Photonics Research Centre,School of Electronic and Communications Engineering,Dublin Institute of Technology [3]Institute of Optoelectronic Materials & Technology,South China Normal University [4]Institute of Cybernetics of CNR,Via Campi Flegrei 34,80072-Pozzuoli,Italy

出　　处：《Communications in Theoretical Physics》2011年第10期727-732,共6页理论物理通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos.60977048 and 61078046;the International Collaboration Program of Ningbo under Grant No.2010D10018;the International Joint Projects CNR/CAS Agreement and the K.C.Wong Magna Fund in Ningbo University,China

摘　　要：A new model is proposed to explain the physical mechanism of the extraordinary transmission enhancement in subwavelength metallic grating.The extraordinary transmission enhancement is described by the co-operation of Fabry-Perot-like(FPL) resonance and the surface plasmon polariton(SPP) resonance.The rigorous coupled-wave analysis(RCWA) and the finite difference time domain(FDTD) method are employed to illustrate the model by calculating the transmission and the field distributions in the subwavelength metallic grating,respectively.And the numerical calculations show that transmission enhancement is achieved when the coupling resonance of the incident light,the surface plasmon polariton mode and the Fabry-Perot-Like mode is happened,which are in good agreement with the proposed model.

关 键 词：GRATINGS subwavelength structures optics at surfaces surface plasmons 

分 类 号：O436[机械工程—光学工程]