Enhancement of scattering and light-extraction by metal particles on silicon waveguides

K. R. Catchpole; S. Pillai

doi:10.1117/12.638391

28 December 2005 Enhancement of scattering and light-extraction by metal particles on silicon waveguides

K. R. Catchpole, S. Pillai

Proceedings Volume 6037, Device and Process Technologies for Microelectronics, MEMS, and Photonics IV; 603708 (2005) https://doi.org/10.1117/12.638391
Event: Microelectronics, MEMS, and Nanotechnology, 2005, Brisbane, Australia

Abstract

Localized surface plasmons on metallic nanoparticles can be surprisingly efficient at coupling light into or out of a silicon waveguide. We have previously reported a factor of 7 times enhancement in the electroluminescence from a silicon-on-insulator light-emitting diode with silver nanoparticles at a wavelength of 930nm. In this paper we model the scattering enhancement for metal particles on a silicon-on-insulator substrate and show that the shape of the spectrum is well predicted using the scattering cross-section and angular dependence of emission of an ideal dipole on a layered substrate. This indicates that the scattering and absorption enhancement at long wavelengths is mainly a single-particle effect, in contrast to previous suggestions that it is a waveguide-mediated multi-particle effect. In particular we show that the particle-waveguide interaction leads to a dramatic enhancement of scattered light at long wavelengths compared with the light scattered by metal islands on glass.

Citation Download Citation

K. R. Catchpole and S. Pillai "Enhancement of scattering and light-extraction by metal particles on silicon waveguides", Proc. SPIE 6037, Device and Process Technologies for Microelectronics, MEMS, and Photonics IV, 603708 (28 December 2005); https://doi.org/10.1117/12.638391

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