摘要A high-resolution plasmonic refractive-index sensor based on a metal-insulator-metal structure consisting of a straight bus waveguide and a resonator waveguide is proposed and numerically simulated by using the finite difference time domain method under a perfectly matched layer absorbing boundary condition. Both analytic and simulated results show that the resonant wavelengths of the sensor have a linear relationship with the refractive index of material under sensing. Based on the relationship, the refractive index of the material can be obtained from the detection of one of the resonant wavelengths. The resolution of refractive index of the nanometeric plasmonic sensor can reach as high as 10−6, giving the wavelength resolution of 0.01 nm. It could be applied to highly-resolution biological sensing.
Abstract:A high-resolution plasmonic refractive-index sensor based on a metal-insulator-metal structure consisting of a straight bus waveguide and a resonator waveguide is proposed and numerically simulated by using the finite difference time domain method under a perfectly matched layer absorbing boundary condition. Both analytic and simulated results show that the resonant wavelengths of the sensor have a linear relationship with the refractive index of material under sensing. Based on the relationship, the refractive index of the material can be obtained from the detection of one of the resonant wavelengths. The resolution of refractive index of the nanometeric plasmonic sensor can reach as high as 10−6, giving the wavelength resolution of 0.01 nm. It could be applied to highly-resolution biological sensing.
[1] Raether H 1998 Surface Plasmon on Smooth and Rough Surfaces and Gratings (Berlin: Springer)
[2] Barnes W L, Dereux A and Ebbesen T W 2003 Nature 424 824
[3] Berini P 2000 Phys. Rev. B 61 10484
[4] Bozhevolnyi S I, Volkov V S, Devaux E and Ebbesen T W 2005 Phys. Rev. Lett. 95 046802
[5] Liu L, Han Z and He S 2005 Opt. Express 13 6645
[6] Moreno E, Rodrigo S G, Bozhevolnyi S I, Martin-Moreno L and Garcia-Vidal F J 2008 Phys. Rev. Lett. 100 023901
[7] Veronis G, Yu Z F, Kocabas S E, Miller D A B, Brongersma M L and Fan S H 2009 Chin. Opt. Lett. 7 302
[8] Neutens P, Dorpe P V, Vlaminck I D, Lagae L and Borghs G 2009 Nature Photonics 3 283
[9] Wang T B, Wen X W, Yin C P and Wang H Z 2009 Opt. Express 17 24096
[10] Gao H, Shi H, Wang C, Du C, Luo X, Deng Q, Lv Y, Lin X and Yao H 2005 Opt. Express 13 10795
[11] Zhao H, Huang X and Huang J 2008 J. Phys. E 40 3025
[12] Bozhevolnyi S, Volkov V, Devaus E, Laluet J and Ebbesen T 2006 Nature 440 508
[13] Gan Q, Guo B, Song G, Chen L, Fu Z, Ding Y J, Bartoli F J 2007 Appl. Phys. Lett. 90 161130
[14] Han Z, Liu L, Forsberg E and He S 2007 IEEE Photon. Technol. Lett. 19 91
[15] Zhang A, Chan K T, Demokan M S, Chan V W C, Chan P C H, Kwok H S and Chan A H P 2005 Appl. Phys. Lett. 86 211108
[16] Liu F, Wan R, Huang Y and Peng J 2009 Opt. Lett. 34 2697
[17] Sepulveda B, Calle A, Lechuga L M and Armelles G 2006 Opt. Lett. 31 1085
[18] Vesseur E J R, Waele R, Lezec H J, Atwater H A, Garcia F J and Ploman A 2008 Appl. Phys. Lett. 92 083110
[19] Vorobyev A Y and Guo C L 2009 Appl. Phys. Lett. 94 224102
[20] Boltasseve A, Bozhevolnyi S I, Nikolajsen T and Leosson K 2006 J. Lightwave Technol. 24 912
[21] Johnson P B and Christy R W 1972 Phys. Rev. B 6 4370
[22] Ugarte D, Chatelain A and Heer W A 1996 Science 274 1897
[23] Veronis G and Fan S H 2007 Opt. Express 15 1211