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Proceedings Paper

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

Paper Details

Date Published: 29 December 2005
PDF: 9 pages
Proc. SPIE 6037, Device and Process Technologies for Microelectronics, MEMS, and Photonics IV, 603708 (29 December 2005); doi: 10.1117/12.638391
Show Author Affiliations
K. R. Catchpole, Univ. of New South Wales (Australia)
S. Pillai, Univ. of New South Wales (Australia)


Published in SPIE Proceedings Vol. 6037:
Device and Process Technologies for Microelectronics, MEMS, and Photonics IV
Jung-Chih Chiao; Andrew S. Dzurak; Chennupati Jagadish; David V. Thiel, Editor(s)

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