[1] [1] J. J. Burke, G. I. Stegeman, and T. Tamir, “Surface polariton like waves guided by thin lossy metalfilms,” Physical Review B, 1986, 33(8): 5186 5201.

[2] [2] H. Raether, Surface plasmons on smooth and rough surfaces and on grating. Berlin, Germany: Springer-Verlag, 1988.

[3] [3] S. A. Zynio, A. V. Samoylov, E. R. Surovtseva, V. M. Mirsky, and Y. M. Shirshov, “Bimetallic layers increase sensitivity of affinity sensors based on SPR,” Sensors, 2002, 2(2): 62 70.

[4] [4] J. Homola, “Present and future of Surface plasmon resonance biosensors,” Analytical and Bioanalytical Chemistry, 2003, 377(3): 528 539.

[5] [5] E. Kretschmann and H. Raether, “Radiative decay of non radiative surface plasmons excited by light,” Zeitschrift für Naturforschung A, 1968, 23(12): 2135 2136.

[6] [6] J. Dostálek, A. Kasry, and W. Knoll, “Long range surface plasmons for observation of biomolecular binding events at metallic surfaces,” Plasmonics, 2007, 2(3): 97 106.

[7] [7] G. G. Nenninger, P. Tobi ka, J. Homola, and S. S. Yee, “Long-range surface plasmons for high-resolution SPR sensors,” Sensors and Actuators B: Chemical, 2001, 74(1 3): 145 151.

[8] [8] B. H. Ong, X. Yuan, S. C. Tjin, J. Zhang, and H. M. Ng, “Optimised film thickness for maximum evanescent field enhancement of a bimetallic film SPR biosensor,” Sensors and Actuators B: Chemical, 2006, 114(2): 1028 1034.

[9] [9] F. C. Chien and S. J. Chen, “A sensitivity comparison of optical biosensor based on four different SPR modes,” Biosensors and Bioelectronics, 2004, 20(3): 633 642.

[10] [10] J. Homola, Surface Plasmon Resonance Based Sensors. Berlin, Germany: Springer-Verlag, 2006.

[11] [11] X. D. Hoa, A. G. Kirk, and M. Tabrizian, “Towards integrated and sensitive surface plasmon resonance biosensors: a review of recent progress,” Biosensors and Bioelectronics, 2007, 23(3): 151 160.

[12] [12] C. W. Lin, K. P. Chen, C. N Hsiao, S. Lin, and C. K. Lee, “Design and fabrication of an alternating dielectric multi-layer device for surface plasmon resonance sensor,” Sensors and Actuators B: Chemical, 2006, 113(1): 169 176.

[13] [13] V. Veselago, “The electrodynamics of substance with simultaneously negative values of ε and μ,” Soviet Physics Uspekhi, 1968, 10(9): 509 514.

[14] [14] D. Sharma, A. Verma, Y. K. Prajapati, V. Singh, and J. P. Saini, “Forward and backward wave propagation in multilayer planar waveguide using metamaterials layer,” Optical and Quantum Electronics, 2013, 45(2): 105 114.

[15] [15] J. B. Pendry, A. J. Holden, D. J. Robbins, and W. J. Stewart, “Magnetism from conductors and enhanced nonlinear phenomena,” IEEE Transactions on Microwave Theory and Techniques, 1999, 47(11): 2075 2084.

[16] [16] R. A. Shelby, D. R. Smith, and S. Schultz, “Experimental verification of a negative index of refraction,” Science, 2011, 292(5514): 77 79.

[17] [17] J. B. Pendry, “Negative refraction makes a perfect lens,” Physical Review Letters, 2000, 85(18): 3966 3969.

[18] [18] T. Chen, S. Li, and H. Sun, “Metamaterials application in sensing,” Sensors, 2012, 12(3): 2742 2765.

[19] [19] A. Upadhyay, Y. K. Prajapati, V. Singh, and J. P. Saini, “Sensitivity estimation of metamaterial loaded planar waveguide sensor,” Optical and Quantum Electronics, 2014, 46(12): 1.

[20] [20] A. Upadhyay, Y. K. Prajapati, V. Singh, and J. P. Saini, “Comprehensive study of reverse index waveguide based sensor with metamaterial as a guiding layer,” Optics Communications, 2015, 348: 71–76.

[21] [21] K. S. Lee, J. M. Son, D. Y. Jeong, T. S. Lee, and W. M. Kim, “Resolution enhancement in SPR sensor based on waveguide coupled mode by combining a bimetallic approach,” Sensors, 2010, 10(12): 11390 11399.

[22] [22] Y. K. Prajapati, A. Yadav, A. Verma, V. Singh, and J. P. Saini, “Effect of metamaterial layer on optical surface plasmon resonance sensor,” Optik International Journal for Light and Electron Optics, 2013, 124(18): 3607 3610.

[23] [23] K. Park, B. J. Lee, C. Fu, and Z. M. Zhang, “Study of the surface and bulk polaritons with negative index metamaterial,” Journal of the Optical Society of America B, 2005, 22(5): 1016 1023.

[24] [24] M. Born and E. Wolf, Principles of optics. Oxford, Britain: Cambridge University Press, 1980.