4.8 Article

Plasmonics for solid-state lighting: enhanced excitation and directional emission of highly efficient light sources

Journal

LIGHT-SCIENCE & APPLICATIONS
Volume 2, Issue -, Pages -

Publisher

NATURE PUBLISHING GROUP
DOI: 10.1038/lsa.2013.22

Keywords

diffraction; fluorescence; LED; nanophotonics; plasmonics

Categories

Funding

  1. Netherlands Organization for Fundamental Research (NWO)
  2. NanoNextNL of the Government of the Netherlands
  3. Grants-in-Aid for Scientific Research [24560824] Funding Source: KAKEN

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Light sources based on reliable and energy-efficient light-emitting diodes (LEDs) are instrumental in the development of solid-state lighting (SSL). Most research efforts in SSL have focused on improving both the intrinsic quantum efficiency (QE) and the stability of light emitters. For this reason, it is broadly accepted that with the advent of highly efficient (QE close to 1) and stable emitters, the fundamental research phase of SSL is coming to an end. In this study, we demonstrate a very large improvement in SSL emission (above 70-fold directional enhancement for p-polarized emission and 60-fold enhancement for unpolarized emission) using nanophotonic structures. This is attained by coupling emitters with very high QE to collective plasmonic resonances in periodic arrays of aluminum nanoantennas. Our results open a new path for fundamental and applied research in SSL in which plasmonic nanostructures are able to mold the spectral and angular distribution of the emission with unprecedented precision.

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