中国物理B ›› 2010, Vol. 19 ›› Issue (4): 47309-047309.doi: 10.1088/1674-1056/19/4/047309

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

杨海方1, 华一磊2, 傅晋欣2, 李江艳2, 李志远2   

  1. (1)Laboratory of Microfabrication, Institute of Physics, Chinese Academy of Sciences, P. O. Box 603, Beijing 100190, China; (2)Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, P. O. Box 603, Beijing 100190, China
  • 收稿日期:2009-05-19 修回日期:2009-08-10 出版日期:2010-04-15 发布日期:2010-04-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos.~10525419, 60736041 and 10874238), and the National Key Basic Research Special Foundation of China (Grant No.~2006CB302901).

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

Hua Yi-Lei(华一磊)a), Fu Jin-Xin傅晋欣)a), Li Jiang-Yan(李江艳)a), Li Zhi-Yuan(李志远)a)†, and Yang Hai-Fang(杨海方)b)   

  1. a Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, P. O. Box 603, Beijing 100190, China; b Laboratory of Microfabrication, Institute of Physics, Chinese Academy of Sciences, P. O. Box 603, Beijing 100190, China
  • Received:2009-05-19 Revised:2009-08-10 Online:2010-04-15 Published:2010-04-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos.~10525419, 60736041 and 10874238), and the National Key Basic Research Special Foundation of China (Grant No.~2006CB302901).

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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.

Abstract: 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.

Key words: surface plasmon, extraordinary light transmission, metal film

中图分类号:  (Metals and metallic alloys)

  • 78.66.Bz
78.67.-n (Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures) 73.22.Lp (Collective excitations) 78.68.+m (Optical properties of surfaces)