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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 19 — Sep. 10, 2012
  • pp: 21520–21531

Silicon based plasmonic coupler

Roney Thomas, Zoran Ikonic, and R.W. Kelsall  »View Author Affiliations

Optics Express, Vol. 20, Issue 19, pp. 21520-21531 (2012)

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Plasmonics is a field in which the light matter interaction can be controlled at the nanoscale by patterning the material surface to achieve enhanced optical effects. Realisation of micron sized silicon based plasmonic devices will require efficient coupling of light from an optical fibre grating coupler into silicon compatible plasmonic waveguides. In this paper we have investigated a silicon based plasmonic coupler with a very short taper length, which confines and focuses light from a broad input fibre opening into a plasmonic waveguide at the apex of the structure. A simple transfer matrix model was also developed to analyse the transmission performance of the coupler with respect to its key physical parameters. The proposed plasmonic coupler was optimised with respect to its different structural parameters using finite element simulations. A maximum coupling efficiency of 72% for light coupling from a 6.2μm wide input opening into a 20nm slit width was predicted. The simulated result also predicted an insertion loss of ≈ 2.0dB for light coupling into a 300nm single mode SOI waveguide from a plasmonic structure with a 10.4μm input opening width and a taper length of only 3.15μm. Furthermore, the application of the optimised plasmonic coupler as a splitter was investigated, in which the structure simultaneously splits and couples light with a predicted coupling efficiency of ≈ 37 % (or a total coupling efficiency of 73%) from a 6.22μm input opening into two 50nm wide plasmonic waveguides.

© 2012 OSA

OCIS Codes
(230.0250) Optical devices : Optoelectronics
(240.6680) Optics at surfaces : Surface plasmons
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optics at Surfaces

Original Manuscript: June 18, 2012
Revised Manuscript: August 17, 2012
Manuscript Accepted: August 26, 2012
Published: September 5, 2012

Roney Thomas, Zoran Ikonic, and R.W. Kelsall, "Silicon based plasmonic coupler," Opt. Express 20, 21520-21531 (2012)

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  1. E. Ozbay, “Plasmonics: merging photonics and electronics at nanoscale dimensions,” Science311, 189–193 (2006). [CrossRef] [PubMed]
  2. T. Ebssen and C. Genet, “Light in tiny holes,” Nature445, 39–46 (2007). [CrossRef]
  3. J. Dionne, L. Sweatlock, M. Sheldon, A. Alivisatos, and H. Atwater, “Silicon based plasmonics for on-chip photonics,” IEEE J. of Sel. Top. in Quantum Electron.16, 295–306 (2010). [CrossRef]
  4. O. Janssen, H. Urbach, and G. Hooft, “On the phase of plasmons excited by slits in a metal film,” Opt. Express14, 11823–11832 (2006). [CrossRef] [PubMed]
  5. L. H. Thio T, T. Ebbesen, K. Pellerin, G. Lewen, A. Nahata, and R. Limke, “Giant optical transmission of subwavelength apertures: physics and applications,” Nanotech.13, 429–432 (2002). [CrossRef]
  6. F. Vidal, H. Lezec, T. Ebbesen, and L. Moreno, “Multiple paths to enhance optical transmission through a single subwavelength slit,” Phys. Rev. Lett.90, 213901 (2003). [CrossRef]
  7. T. Thio, K. Pellerin, and R. Linke, “Enhanced ligh transmission through single subwavelength aperture,” Opt. Lett.26, 1972–1974 (2001). [CrossRef]
  8. S. Palacios, O. Mahboub, G. Vidal, L. Moreno, S. Rodrigi, C. Genet, and T. Ebbesen, “Mechanisms for extraordinary transmission through bull’s eye structures,” Opt. Express19, 10429–10442 (2011). [CrossRef]
  9. H. Lezec, A. Degiron, R. Linke, M. Moreno, F. Vidal, and T. Ebbesen, “Beaming light from a subwavelength aperture,” Science297, 820–822 (2002). [CrossRef] [PubMed]
  10. H. Ghaemi, T. Thio, G. D.E, T. Ebbesen, and H. Lezec, “Surface plasmons enhanced optical transmission through subwavelength holes,” Phys. Rev. B58, 6779–6782 (1998). [CrossRef]
  11. F. Vidal, H. Lezec, T. Ebbesen, and M. Moreno, “Light passing through subwavelength apertures,” Rev. Mod. Phys.82, 729–787 (2010). [CrossRef]
  12. T. Sondergaard, S. Bozhevolnyi, S. Novikov, J. Beermann, E. Devaux, and Ebbesen, “Extraordinary optical transmission enhanced by nanofocusing,” Nano Lett.10, 3123–3128 (2010). [CrossRef] [PubMed]
  13. O. T. A. Janssen, H. P. Urbach, and G. W. Hooft, “Giant optical transmission of a subwavelength slit optimised using the magnetic field phase,” Phys. Rev. Lett.99, 043902 (2007). [CrossRef] [PubMed]
  14. L. Yin, V.-V. V.K, J. Pearson, J. Hiller, J. Hua, U. Welp, D. Brown, and C. Kimball, “Subwavelength focusing and guiding of surface plasmons,” Nano Lett.5, 1399–1402 (2005). [CrossRef] [PubMed]
  15. H. Lezec and T. Thio, “Diffracted evanescent model for enhanced and suppressed optical transmission through subwavelength hole arrays,” Opt. Express12, 3629–3651 (2004). [CrossRef] [PubMed]
  16. G. Li and A. Xu, “Phase shifts of plasmons excited by slits in a metal film illuminated by oblique incident TM plane wave,” Proc. SPIE7135, 71350T–9 (2008). [CrossRef]
  17. L. G. Yuan, C. Lin, X. Feng, and X. An-Shi, “Plasmonic corrugated horn structure for optical transmission enhancement,” Chin. Phys. Lett.26, 124205 (2009). [CrossRef]
  18. C. Mentzer and L. Peters, “Pattern analysis of corrugated horn antennas,” IEEE Tran. on Ant. and Prop.24, 304–309 (1976). [CrossRef]
  19. S. Sederberg, V. Van, and A. Ellezabi, “Monolithic integration of plasmonic waveguides into complimentary metal-oxide-semiconductor and photonic compatible platform,” Appl. Phys. Lett.96, 121101 (2010). [CrossRef]
  20. Comsol Multiphysics, www.comsol.com , 3rd edition.
  21. P. Johnson and R. Christy, “Optical constants of noble metals,” Phys. Rev. B6, 4370–4379 (1972). [CrossRef]
  22. X. Huang and M. Brongersma, “Rapid computation of light scattering from aperiodic plasmonic structures,” Phys. Rev. B84, 245120 (2011). [CrossRef]
  23. M. Kuttge, F. Garcia, and A. Polamn, “How grooves reflect and confine surface plasmon polaritons,” Opt. Express17, 10385–10392 (2009). [CrossRef] [PubMed]
  24. J. Galan, P. Sanchis, B. Sanchez, and J. Marti, “Polarisation insensitive fibre to SOI waveguide experimental coupling technique integrated with a v-groove structure,” Group IV Photonics, 4th IEEE International Conference, 1–3 (2007). [CrossRef]
  25. H. Sun, A. Chen, A. Szep, and L. R. Dalton, “Efficient fibre coupler for vertical silicon slot waveguides,” Opt. Express17, 22571–22577 (2009). [CrossRef]
  26. K. Shiraishi, M. Kagaya, K. Muro, H. Yoda, Y. Kogami, and C. Tsai, “Single mode fibre with a plano-convex silicon microlens for integrated butt-coupling scheme,” Opt. Express47, 6345–6349 (2008).
  27. S. Zhu, G. Q. Lo, and D. L. Kwong, “Theoretical investigation of silicon MOS-type plasmonic slot waveguide based MZI modulators,” Opt. Express18, 27802–27819 (2010). [CrossRef]
  28. R. Thomas, Z. Ikonic, and R. Kelsall, “Electro-optic metal-insulator-semiconductor-insulator-metal Mach-Zehnder plasmonic modulator,” Phot. and Nanostructres10, 183–189 (2011). [CrossRef]

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