The influence of hole shape on enhancing transmission through subwavelength hole arrays
Sun Mei (孙梅)a, Liu Rong-Juan (刘荣鹃)a, Li Zhi-Yuan (李志远)a, Cheng Bing-Ying (程丙英)a, Zhang Dao-Zhong (张道中)a, Yang Hai-Fang (杨海方)b, Jin Ai-Zi (金爱子)b
a Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; b Laboratory of Micro Fabrication, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
Abstract The extraordinary light transmission through a 200-nm thick gold film when passing through different subwavelength hole arrays is observed experimentally. The sample is fabricated by electron beam lithography and reactive ion etching system. A comparison between light transmissions shows that the hole shape changing from rectangular to diamond strongly affects the transmission intensity although both structures possess the same lattice constant of 600 nm. Moreover, the position of the transmission maximum undergoes a spectral red-shift of about 63 nm. Numerical simulations by using a transfer matrix method reproduce the observed transmission spectrum quite well.
Received: 23 February 2006
Revised: 05 April 2006
Accepted manuscript online:
PACS:
73.20.Mf
(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
Fund: Project supported by National Natural Science Foundation of China (Grant No 10525419), the National Key Basic Research Special Foundation of China (Grant Nos 2001CB6104 and 2003CB7169), and the Presidential Foundation of the Chinese Academy Sciences, Chin
Cite this article:
Sun Mei (孙梅), Liu Rong-Juan (刘荣鹃), Li Zhi-Yuan (李志远), Cheng Bing-Ying (程丙英), Zhang Dao-Zhong (张道中), Yang Hai-Fang (杨海方), Jin Ai-Zi (金爱子) The influence of hole shape on enhancing transmission through subwavelength hole arrays 2006 Chinese Physics 15 1591
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