Design of a surface plasmon resonance sensor based on grating connection

Abstract

Nowdays, the study of measurement of the biological field focuses on the research of improving surface plasmon resonance (SPR) in the fields of integration and detection sensitivity. We designed a kind of grating connected surface plasmon resonance sensor. Theoretically, we analyzed the wave vector and the effective refractive index relations with the diffraction grating structure. Then we obtained the nanoparticles enhancement SPR structure with a resolution 10 times higher than that of traditional SPR sensors. Also, we used the finite-difference time-domain (FDTD) analysis and simulation which showed that it was obvious with coupling effect by the nanoparticles enhancement SPR structure that the reflectance spectral bandwidth results validated the structure significantly which improved the sensitivity. Experimental results showed that the dynamic response of the designed sensor reached 10⁻⁶ RIU (refractive index unit). This study has the certain significance to long-distance and special sensing applications.

Keywords

Surface plasmon resonance / waveguide grating / mode coupling / sensitivity / resolution

References

[1] Berini P. Plasmon-polariton waves guided by thin lossy metal films of finite width: bound modes of symmetric structures. Physical Review B, 2000, 611(15): 10484-10503.

[2] Okamoto T, H’Dhili F, Kawata S. Towards plasmonic band gap laser. Applied Physics Letters, 2004, 85(18): 3968-3970.

[3] Winter G, Wedge S, Barnes W L. Can lasing at visible wavelength be achieved using the low-loss long-range surface plasmon-polariton mode?. New Journal of Physics, 2006, 8(125): 1-14.

[4] Alam M Z, Meier J, Aitchison J S, Mojahedi M. Gain assisted surface plasmon polariton in quantum well structures. Optics Express, 2007, 15(1): 176-182.

[5] Ambati M, Genov D A, Oulton R F, Zhang X. Active plasmonics: surface plasmon interaction with optical emitters. IEEE Journal of Selected Topics in Quantum Electronics, 2008, 14(6): 1395-1403.

[6] Kovyakov A, Zakharian A R, Gundu K M, Darmanyan S A. Giant optical resonances due to gain-assisted Bloch surface plasmon. Applied Physics Letters, 2009, 94(15): 151111-1-151111-3.

[7] Berini P. Long-range surface plasmon polaritons. Advances in Optics and Photonics, 2009, 1(3): 484-588.

[8] Leon I D, Berini P. Modeling surface plasmon-polariton gain in planar metallic structures. Optics Express, 2009, 17(22): 20191-20202.

[9] Leon I D, Berini P. Amplification of long-range surface plasmons by a dipolar gain medium. Nature Photonics, 2010, 4(6): 382-387.

[10] Gather M C, Meerholz K, Danz N, Leosson K. Net optical gain in a plasmonic waveguide embedded in a fluorescent polymer. Nature Photonics, 2010, 4(7): 457-461.

[11] H’Dhili F, Okamoto T, Simonen J, Kawata S. Improving the emission efficiency of periodic plasmonic structures for lasing applications. Optics Communications, 2011, 284(2): 561-566.

[12] Chen Y, Guo L. High Q long-range surface plasmon polariton modes in sub-wavelength metallic microdisk cavity. Plasmonics, 2011, 6(1): 183-188.

[13] Leon I D, Berini P. Spontaneous emission in long-range surface plasmonpolariton amplifiers. Physical Review B, 2011, 83(8): 081414(R).

[14] Leon I D, Berini P. Measuring gain and noise in active long-range surface plasmon-polariton waveguides. Review of Scientific Instruments, 2011, 82(3): 033107.

[15] Flynn R A, Kim C S, Vurgaftman I, Kim M, Meyer J R, Mäkinen A J, . A room-temperature semiconductor spaser operating near 1.5 μm. Optics Express, 2011, 19(9): 8954-8961.

[16] Pile D F P, Ogawa T, Gramotnev D K, Matsuzaki Y, Vernon K C, Yamaguchi K, . Two-dimensionally localized modes of a nanoscale gap plasmon waveguide. Applied Physics Letters, 2005, 87(26): 261114.

[17] Physical Review B, 2006, 73(3035407

[18] Maier S A. Gain-assisted propagation of electromagnetic energy in subwavelength surface plasmon polariton gap waveguides. Optics Communications, 2006, 258(2): 295-299.

[19] Yu Z, Veronis G, Fan S, Brongersma M L. Gain-induced switching in metal-dielectric-metal plasmonic waveguides. Applied Physics Letters, 2008, 92(4): 041117-1-041117-3.