Enhanced light extraction from InGaN/GaN quantum wells with silver gratings

Estelle Homeyer, Päivi Mattila, Jani Oksanen, Toufik Sadi, Henri Nykänen, Sami Suihkonen, Clementine Symonds, Jukka Tulkki, Filip Tuomisto, Markku Sopanen, Joel Bellessa

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28 Citations (Scopus)
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Abstract

We demonstrate that an extraction enhancement by a factor of 2.8 can be obtained for a GaN quantum well structure using metallic nanostructures, compared to a flat semiconductor. The InGaN/GaN quantum well is inserted into a dielectric waveguide, naturally formed in the structure, and a silver grating is deposited on the surface and covered with a polymer film. The polymer layer greatly improves the extraction compared to a single metallic grating. The comparison of the experiments with simulations gives strong indications on the key role of weakly guided modes in the polymer layer diffracted by the grating.
Original languageEnglish
Article number081110
Pages (from-to)1-4
Number of pages4
JournalApplied Physics Letters
Volume102
Issue number8
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

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