15 October 2014 Near-field plasmon effects in extraordinary optical transmission through periodic triangular hole arrays
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Abstract
We present a theoretical investigation of the transmission properties of light through a metallic film perforated with different arrays of compound triangular holes. The extraordinary optical transmission (EOT) in the optical region is obtained by employing the finite-difference time-domain method. The excitation of localized surface plasmon resonances (LSPRs) at the top corners and surface plasmon polaritons (SPPs) on the metal surface, plasmon coupling effects between adjacent apertures, and the waveguide modes for delivering light mainly contribute to the EOT in such structures. The optical characteristics can be effectively tailored by changing the arrangement of triangular holes and the structural parameters. This study may be helpful for plasmonic nanostrucutres based on EOT, and has potential applications in optoelectronic devices.
© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
Xiangnan Zhang, Guiqiang Liu, Zhengqi Liu, Ying Hu, Zhengjie Cai, Xiaoshan Liu, Guolan Fu, Mulin Liu, "Near-field plasmon effects in extraordinary optical transmission through periodic triangular hole arrays," Optical Engineering 53(10), 107108 (15 October 2014). https://doi.org/10.1117/1.OE.53.10.107108
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