Surface Plasmon Resonance of a Few Particles Linear Arrays
- 1
- 2
Abstract
We present a study of the enhancement of the electric field due to localized surface plasmons in a short chain of metallic nanoparticles with different shapes: spheres, cylinders and spheroids. We calculate numerically the external radiation effect on these chains and analyze besides the shape, also the influence on size, interparticle distances and number of nanoparticles, corroborating that each one plays a definitive role for the enhancement of the electric field. Particularly, we focus on the main features of the electric field in the inter-particle regions, where an enormous increasing is expected due to the longitudinal localized plasmons. The electric field distribution along the chain shows a maximum in the middle of the chain. This fact could be related to a hybridization effect as the gap between particles decreases below 2 nm, we also observe a strong enhancement with the number of nanoparticles. Also regarding the shape we find agreement with reported results on spheroids, moreover we show that lateral coupled cylinders are more flexible to tune the enhancement factor than all other.
- E. Abbe, “Beitrge Zur Theorie des Mikroskops und der Mikroskopischen Wahrnehmung,” Archiv für mikroskopische Anatomie, Vol. 9, 1873, pp. 413-420.
- Y. Inouye and S. Kawata, “Near-Field Scanning Optical Microscope with a Metallic Probe Tip,” Optics Letters, Vol. 19, No. 3, 1994, pp. 159-161. doi:10.1364/OL.19.000159
- J. B. Pendry, “Negative Refraction Makes a Perfect Lens,” Physical Review Letters, Vol. 85, No. 18, 2000, pp. 3966-3969. doi:10.1103/PhysRevLett.85.3966
- D. R. Smith, D. Schurig, M. Rosenbluth and S. Schultz, “Limitations on Subdiffraction Imaging with a Negative Refractive Index Slab,” Applied Physics Letters, Vol. 82, No. 10, 2003, Aiticle ID: 1506.
- J. A. Schuller, E. S. Barnard, W. Cai, Y. C. Jun, J. S. White and M. L. Brongersma, “Plasmonics for Extreme Light Concentration and Manipulation,” Nature Materials, Vol. 9, No. 3, 2010, pp. 193-204. doi:10.1038/nmat2630
- H. W. Ch. Postma, “Rapid Sequencing of Individual DNA Molecules in Graphene Nanogaps,” Nano Letters, Vol. 10, No. 2, 2010, pp. 420-425. doi:10.1021/nl9029237
- M. Guillon, “Field Enhancement in a Chain of Optically Bound Dipoles,” Optics Express, Vol. 14, No. 7, 2006, pp. 3045-3055. doi:10.1364/OE.14.003045
- M. L. Brongersma and P. G. Kik, “Surface Plasmon Nano- photonics,” Springer Series in Optical Sciences, Vol. 131, 2007, pp. 1-9. doi:10.1007/978-1-4020-4333-8
- K. Kneipp, Y. Wang, H. Kneipp, I. Itzkan, R. R. Dassari and M. S. Feld, “Surface-Enhanced Raman Scattering from Individual Au Nanoparticles and Nanoparticle Dimer Substrates,” Physical Review Letters, Vol. 76, 1996, pp. 2444- 2447. doi:10.1103/PhysRevLett.76.2444
- R. C. Maher, L. F. Cohen, P. Etchegoin, H. J. N. Hartigan, R. J. C. Brown and M. J. T. Milton, “Stokes/Anti-Stokes Anomalies under Surface Enhanced Raman Scattering Conditions,” Journal of Chemical Physics, Vol. 120, No. 24, 2004, pp. 11746-11753. doi:10.1063/1.1739398
- A. M. Michaels, J. Jiang and L. Brus, “Ag Nanocrystal Junctions as the Site for Surface-Enhanced Raman Scat- tering of Single Rhodamine 6 G Molecules,” The Journal of Physical Chemestry B, Vol. 104, No. 50, 2000, pp. 11965-11971. doi:10.1021/jp0025476
- H. Xu, J. Aizpurua, M. K?ll and P. Apell, “Electro- magnetic Contributions to Single-Molecule Sensitivity in Surface-Enhanced Raman Scattering,” Physical Review E, Vol. 62, No. 3, 2000, pp. 4318-4324. doi:10.1103/PhysRevE.62.4318