中国物理B ›› 2010, Vol. 19 ›› Issue (1): 17303-017303.doi: 10.1088/1674-1056/19/1/017303

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Extraordinary optical transmission through metal gratings with single and double grooved surfaces

钮月萍1, 龚尚庆1, 汪丽春2, 邓立2, 崔妮2   

  1. (1)State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; (2)State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;Graduate School of Chinese Academy of Sciences, Beijing 100039, China
  • 收稿日期:2009-02-19 修回日期:2009-03-20 出版日期:2010-01-15 发布日期:2010-01-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 60708008) and the Project of Academic Leaders in Shanghai (Grant No. 07XD14030) and the Knowledge Innovation Program of the Chinese Academy of Sciences.

Extraordinary optical transmission through metal gratings with single and double grooved surfaces

Wang Li-Chun(汪丽春)a)b), Deng Li(邓立) a)b), Cui Ni(崔妮)a)b) Niu Yue-Ping(钮月萍)a), and Gong Shang-Qing(龚尚庆)a)†   

  1. a State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; b Graduate School of Chinese Academy of Sciences, Beijing 100039, China
  • Received:2009-02-19 Revised:2009-03-20 Online:2010-01-15 Published:2010-01-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 60708008) and the Project of Academic Leaders in Shanghai (Grant No. 07XD14030) and the Knowledge Innovation Program of the Chinese Academy of Sciences.

摘要: We investigate the transmission properties of a normally incident TM plane wave through metal films with periodic parabolic-shaped grooves on single and double surfaces using the finite-difference-time-domain method. Nearly zero transmission efficiency is found at wavelengths corresponding to surface plasmon excitation on a flat surface in the case where the single surface is grooved. Meanwhile, resonant excitation of surface plasmon polariton (SPP) Bloch modes leads to a strong transmission peak at slightly larger wavelengths. When the grating is grooved on double surfaces, the transmission enhancement can be dramatically improved due to the resonant tunnelling between SPP Bloch modes.

Abstract: We investigate the transmission properties of a normally incident TM plane wave through metal films with periodic parabolic-shaped grooves on single and double surfaces using the finite-difference-time-domain method. Nearly zero transmission efficiency is found at wavelengths corresponding to surface plasmon excitation on a flat surface in the case where the single surface is grooved. Meanwhile, resonant excitation of surface plasmon polariton (SPP) Bloch modes leads to a strong transmission peak at slightly larger wavelengths. When the grating is grooved on double surfaces, the transmission enhancement can be dramatically improved due to the resonant tunnelling between SPP Bloch modes.

Key words: metal grating, surface plasmon, transmission

中图分类号:  (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))

  • 73.20.Mf
42.79.Dj (Gratings) 68.55.-a (Thin film structure and morphology) 78.66.Bz (Metals and metallic alloys)