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The non-resonantly enhanced optical transmission phenomenon of sub-wavelength metallic slits on a thin film is significant for broadband light harvesting devices. To improve the efficiency of transmission, in this paper, we propose a compound structure of the tapered metallic slit embedded with rectangular cavity, and its optical properties are investigated by the finite element method. The results show that the compound structure leads to a higher transmission than the tapered metallic slit without rectangular cavity. In addition, the effects of the structure parameters and the position of the rectangular cavity on the transmission property are also studied. These results would be helpful for designing metallic slits with high transmission.
[1] Ebbesen T W, Lezec H J, Ghaemi H F, Thio T, Wolff P A 1998 Nature 391 667
[2] Barnes W L, Dereux A, Ebbesen T W 2003 Nature 424 824
[3] Dahlin A, Zach M, Rindzevicius T, Kall M, Sutherland D S, Hook F 2005 J. Am. Chem. Soc. 127 5043
[4] Tian Z Q, Ren B, Wu D Y 2002 J. Phys. Chem. B 106 9463
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[6] Mao H B, Yang C L, Lai Z S 2004 Acta Phys. Sin. 53 2201 (in Chinese) [茅惠兵, 杨昌利, 赖宗声 2004 物理学报 53 2201]
[7] Zeng Z W, Liu H T, Zhang S W 2012 Acta Phys. Sin. 61 200701 (in Chinese) [曾志文, 刘海涛, 张斯文 2012 物理学报 61 200701]
[8] Hao P, Wu Y H, Zhang P 2010 Acta Phys. Sin. 59 6532 (in Chinese) [郝鹏, 吴一辉, 张平 2010 物理学报 59 6532]
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[12] Wang Y W, Liu M L, Liu R J, Lei H N, Tian X L 2011 Acta Phys. Sin. 60 024217 (in Chinese) [王亚伟, 刘明礼, 刘仁杰, 雷海娜, 田相龙2011 物理学报 60 024217]
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[14] Wang Y H, Wang Y Q, Zhang Y, Liu S T 2009 Opt. Express 17 5014
[15] Genet C, Ebbesen T W 2007 Nature 445 39
[16] Klein Koerkamp K J, Enoch S, Segerink F B, van Hulst N F, Kuipers L 2004 Phys. Rev. Lett. 92 183901
[17] Orbons S M, Roberts A 2006 Opt. Express 14 12623
[18] Gordon R, Brolo A G, McKinnon A, Rajora A, Leathem B, Kavanagh K L 2004 Phys. Rev. Lett. 92 037401
[19] Degiron A, Ebbesen T W 2005 J. Opt. A: Pure Appl. Opt. 7 S90
[20] Bao Y J, Peng R W, Shu D J, Wang M, Lu X, Shao J, Lu W, Ming N B 2008 Phys. Rev. Lett. 101 087401
[21] Wang C L, Gu J Q, Han J G, Xing Q R, Tian Z, Liu F, Chai L, Li Y F, Hu M L, Wang Q Y, Lu X C, Zhang W L 2010 Appl. Phys. Lett. 96 251102
[22] Ruan Z C, Qiu M 2006 Phys. Rev. Lett. 96 233901
[23] Subramania G, Foteinopoulou S, Brener I 2011 Phys. Rev. Lett. 107 163902
[24] Shen H H, Maes B 2012 Appl. Phys. Lett. 100 241104
[25] Sun M, Liu R J, Li Z Y, Cheng B Y, Zhang D Z, Yang H F, Jin A Z 2006 Chin. Phys. 15 1591
[26] Li Z, Zhang J S, Yan H F, Gong Q H 2007 Chin. Phys. Lett. 24 3233
[27] Johnson P B, Christy R W 1972 Phys. Rev. B 6 4370
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[1] Ebbesen T W, Lezec H J, Ghaemi H F, Thio T, Wolff P A 1998 Nature 391 667
[2] Barnes W L, Dereux A, Ebbesen T W 2003 Nature 424 824
[3] Dahlin A, Zach M, Rindzevicius T, Kall M, Sutherland D S, Hook F 2005 J. Am. Chem. Soc. 127 5043
[4] Tian Z Q, Ren B, Wu D Y 2002 J. Phys. Chem. B 106 9463
[5] Wang Z L 2009 Rep. Prog. Phys. 29 287 (in Chinese) [王振林 2009 物理学进展 29 287]
[6] Mao H B, Yang C L, Lai Z S 2004 Acta Phys. Sin. 53 2201 (in Chinese) [茅惠兵, 杨昌利, 赖宗声 2004 物理学报 53 2201]
[7] Zeng Z W, Liu H T, Zhang S W 2012 Acta Phys. Sin. 61 200701 (in Chinese) [曾志文, 刘海涛, 张斯文 2012 物理学报 61 200701]
[8] Hao P, Wu Y H, Zhang P 2010 Acta Phys. Sin. 59 6532 (in Chinese) [郝鹏, 吴一辉, 张平 2010 物理学报 59 6532]
[9] Rindzevicius T, Alaverdyan Y, Dahlin A, Höök F, Sutherland D S, Käll M 2005 Nano Lett. 5 2335
[10] Gbur G, Schouten H F, Visser T D 2005 Appl. Phys. Lett. 87 191109
[11] Partovi A, Peale D, Wuttig M, Murray C A, Zydzik G, Hopkins L, Baldwin K, Hobson W S, Wynn J, Lopata J, Dhar L, Chichester R, Yeh H J J 1999 Appl. Phys. Lett. 75 1515
[12] Wang Y W, Liu M L, Liu R J, Lei H N, Tian X L 2011 Acta Phys. Sin. 60 024217 (in Chinese) [王亚伟, 刘明礼, 刘仁杰, 雷海娜, 田相龙2011 物理学报 60 024217]
[13] Sun Z J, Zuo X L 2009 Opt. Lett. 34 1411
[14] Wang Y H, Wang Y Q, Zhang Y, Liu S T 2009 Opt. Express 17 5014
[15] Genet C, Ebbesen T W 2007 Nature 445 39
[16] Klein Koerkamp K J, Enoch S, Segerink F B, van Hulst N F, Kuipers L 2004 Phys. Rev. Lett. 92 183901
[17] Orbons S M, Roberts A 2006 Opt. Express 14 12623
[18] Gordon R, Brolo A G, McKinnon A, Rajora A, Leathem B, Kavanagh K L 2004 Phys. Rev. Lett. 92 037401
[19] Degiron A, Ebbesen T W 2005 J. Opt. A: Pure Appl. Opt. 7 S90
[20] Bao Y J, Peng R W, Shu D J, Wang M, Lu X, Shao J, Lu W, Ming N B 2008 Phys. Rev. Lett. 101 087401
[21] Wang C L, Gu J Q, Han J G, Xing Q R, Tian Z, Liu F, Chai L, Li Y F, Hu M L, Wang Q Y, Lu X C, Zhang W L 2010 Appl. Phys. Lett. 96 251102
[22] Ruan Z C, Qiu M 2006 Phys. Rev. Lett. 96 233901
[23] Subramania G, Foteinopoulou S, Brener I 2011 Phys. Rev. Lett. 107 163902
[24] Shen H H, Maes B 2012 Appl. Phys. Lett. 100 241104
[25] Sun M, Liu R J, Li Z Y, Cheng B Y, Zhang D Z, Yang H F, Jin A Z 2006 Chin. Phys. 15 1591
[26] Li Z, Zhang J S, Yan H F, Gong Q H 2007 Chin. Phys. Lett. 24 3233
[27] Johnson P B, Christy R W 1972 Phys. Rev. B 6 4370
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