Direct optical measurement of light coupling into planar waveguide by plasmonic nanoparticles
| Autor: | Antti M. Pennanen, J. Jussi Toppari |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Materials science
ta221 FOS: Physical sciences Physics::Optics Waveguide (optics) Electric Power Supplies Solar Energy Transmittance Scattering Radiation Computer Simulation Plasmonic nanoparticles ta114 business.industry High-refractive-index polymer technology industry and agriculture Membranes Artificial Equipment Design Surface Plasmon Resonance Atomic and Molecular Physics and Optics Coupling (electronics) Refractometry Computer-Aided Design Nanoparticles Optoelectronics Quantum efficiency business Refractive index Physics - Optics Optics (physics.optics) Localized surface plasmon |
| Zdroj: | Optics Express. 21:A23 |
| ISSN: | 1094-4087 |
| Popis: | Coupling of light into a thin layer of high refractive index material by plasmonic nanoparticles has been widely studied for application in photovoltaic devices, such as thin-film solar cells. In numerous studies this coupling has been investigated through measurement of e.g. quantum efficiency or photocurrent enhancement. Here we present a direct optical measurement of light coupling into a waveguide by plasmonic nanoparticles. We investigate the coupling efficiency into the guided modes within the waveguide by illuminating the surface of a sample, consisting of a glass slide coated with a high refractive index planar waveguide and plasmonic nanoparticles, while directly measuring the intensity of the light emitted out of the waveguide edge. These experiments were complemented by transmittance and reflectance measurements. We show that the light coupling is strongly affected by thin-film interference, localized surface plasmon resonances of the nanoparticles and the illumination direction (front or rear). Comment: 13 pages, 7 figures. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: [http://dx.doi.org/10.1364/OE.21.000A23] Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject |
| Databáze: | OpenAIRE |
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