Significantly enhanced transmission achieved with double-layered metallic aperture arrays with sub-skin-depth Ag film  

作　　者：肖功利 杨宏艳 

机构地区：[1]School of Information and Communication,Guilin University of Electronic Technology [2]School of Computer Science and Engineering,Guilin University of Electronic Technology

出　　处：《Journal of Semiconductors》2012年第12期1-4,共4页半导体学报（英文版）

摘　　要：We present both theoretical and experimental investigation on significantly enhanced transmission through （Ag/Au） double-layered metallic aperture arrays with sub-skin-depth Ag film due to the coupling role of a surface plasmon polariton at the Ag/Au interface by evanescent waves. The results indicate that the enhanced transmittance is highly dependent on the Ag film thickness. When the Ag film thickness increases, the peak transmit- tance firstly increases and then decreases. Moreover, other metal material properties are also discussed. The highest peak transmittance is obtained when the Ag film thickness is 4 nm. The finite-difference time-domain simulations agree well with the experimental results. This finding provides an effective way to control the enhanced transmis- sion for double-layered metallic aperture arrays, which has potential applications in designing a high-performance plasmonic thermal emitter.We present both theoretical and experimental investigation on significantly enhanced transmission through （Ag/Au） double-layered metallic aperture arrays with sub-skin-depth Ag film due to the coupling role of a surface plasmon polariton at the Ag/Au interface by evanescent waves. The results indicate that the enhanced transmittance is highly dependent on the Ag film thickness. When the Ag film thickness increases, the peak transmit- tance firstly increases and then decreases. Moreover, other metal material properties are also discussed. The highest peak transmittance is obtained when the Ag film thickness is 4 nm. The finite-difference time-domain simulations agree well with the experimental results. This finding provides an effective way to control the enhanced transmis- sion for double-layered metallic aperture arrays, which has potential applications in designing a high-performance plasmonic thermal emitter.

关 键 词：optics at surfaces surface plasmon polariton coupling sub-skin-depth FDTD method double-layeredmetallic aperture arrays enhanced transmission 

分 类 号：O484.4[理学—固体物理]