Experimental studies of extraordinary light transmission through periodic arrays of subwavelength square and rectangular holes in metal films  

作　　者：华一磊 傅晋欣 李江艳 李志远 杨海方 

机构地区：[1]Laboratory of Optical Physics,Institute of Physics,Chinese Academy of Sciences [2]Laboratory of Microfabrication,Institute of Physics,Chinese Academy of Sciences

出　　处：《Chinese Physics B》2010年第4期413-417,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. 10525419,60736041 and 10874238);the National Key Basic Research Special Foundation of China (Grant No. 2006CB302901)

摘　　要：We fabricate a series of periodic arrays of subwavelength square and rectangular air holes on gold films, and measure the transmission spectra of these metallic nanostructures. By changing some geometrical and physical parameters, such as array period, air hole size and shape, and the incident light polarization, we verify that both global surface plasmon resonance and localized waveguide mode resonance are influential on enhancing the transmission of light through nanostructured metal films. These two resonances induce different behaviours of transmission peak shift. The transmission through the rectangular air-hole structures exhibits an obvious polarization effect dependent on the morphology. Numerical simulations are also made by a plane-wave transfer-matrix method and in good consistency with the experimental results.We fabricate a series of periodic arrays of subwavelength square and rectangular air holes on gold films, and measure the transmission spectra of these metallic nanostructures. By changing some geometrical and physical parameters, such as array period, air hole size and shape, and the incident light polarization, we verify that both global surface plasmon resonance and localized waveguide mode resonance are influential on enhancing the transmission of light through nanostructured metal films. These two resonances induce different behaviours of transmission peak shift. The transmission through the rectangular air-hole structures exhibits an obvious polarization effect dependent on the morphology. Numerical simulations are also made by a plane-wave transfer-matrix method and in good consistency with the experimental results.

关 键 词：surface plasmon extraordinary light transmission metal film 

分 类 号：TB383.2[一般工业技术—材料科学与工程]