Details

Autor(en) / Beteiligte

• Homeyer, E.
• Mattila, P.
• Oksanen, J.
• Sadi, T.
• Nykänen, H.
• Suihkonen, S.
• Symonds, C.
• Tulkki, J.
• Tuomisto, F.
• Sopanen, M.
• Bellessa, J.

Titel

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

Ist Teil von

• Applied physics letters, 2013-02, Vol.102 (8)

Ort / Verlag

American Institute of Physics

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.