摘要Surface plasmons (SPs) associated optical single-pass effect has been investigated in novel subwavelength metallic structures, including single slit and grating structures. With influence of SPs, these metallic structures can enhance transmission in incident direction and suppress it in the opposite direction, exhibiting a single-pass effect. The finite difference time domain method is employed to study the influences of structure parameters on far-field transmission, near-field electric field distribution and extinction ratio of the single-pass transmission effect. A maximal extinction ratio of 47.83dB is achieved in the grating structure.
Abstract：Surface plasmons (SPs) associated optical single-pass effect has been investigated in novel subwavelength metallic structures, including single slit and grating structures. With influence of SPs, these metallic structures can enhance transmission in incident direction and suppress it in the opposite direction, exhibiting a single-pass effect. The finite difference time domain method is employed to study the influences of structure parameters on far-field transmission, near-field electric field distribution and extinction ratio of the single-pass transmission effect. A maximal extinction ratio of 47.83dB is achieved in the grating structure.
[1] Ebbesen T W, Lezec H J, Ghaemi H F, Thio T and Wolff P A 1998 Nature 391 667 [2] Barnes W L, Dereux A and Ebbesen T W 2003 Nature 424824 [3] Maier S A and Atwater H A 2005 J. Appl. Phys. 98 011101 [4] Lezec H J, Degiron A, Devaux E, Linke R A, Martin-Moreno L,Garcia-Vidal F J and Ebbesen T W 2002 Science 297 820 [5] Garc\'\i a-Vidal F J, Lezec H J, Ebbesen T W and Martin-MorenoL 2003 Phys. Rev. Lett. 90 213901 [6] Lockyear M J, Hibbins A P, Sambles J R and Lawrence C R 2005 J. Opt. A: Pure Appl. Opt. 7 152 [7] Degiron A and Ebbesen T W 2004 Opt. Exp. 12 3694 [8] Jiao X J, Wang P, Tang L, Lu Y, Li Q, Zhang D G, Yao P J, Ming Hand Xie J P 2005 Appl. Phys. B 80 301 [9] Lee K G and Park Q H 2005 Phys. Rev. Lett. 95 103902 [10] Schouten H F, Kuzmin N, Dubois G, Visser T D, Gbur G, Alkemade P FA, Blok H, Hooft G W, Lenstra D and Eliel E R 2005 Phys. Rev.Lett. 94 053901 [11] Lalanne P and Hugonin J P 2006 Nature Phys. 2 551 [12] Palik E D 1985 Handbook of Optical Constants of Solids (NewYork: Academic) [13] Taflove A and Hagness S 2000 Computational Electrodynamics:The Finite-Difference Time-Domain Method (Boston: Artech House) [14] Jubkins J B and Ziolkowski R W 1995 J. Opt. Soc. Am. A 12 1974 [15] Harms P, Mittra R and Ko W 1994 IEEE Trans. AntennasPropagat. 42 1317 [16] Berenger J P 1994 J. Comput. Phys. 114 185
2007, Vol. 24 
