Waveguide-coupled nanopillar metal-cavity light-emitting diodes on silicon

V.M. Dolores Calzadilla, B.M. Patarata Romeira, F. Pagliano, S. Birindelli, A. Higuera Rodriguez, P.J. van Veldhoven, M.K. Smit, A. Fiore, D. Heiss

Research output: Contribution to journalArticleAcademicpeer-review

43 Citations (Scopus)
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Abstract

Nanoscale light sources using metal cavities have been proposed to enable high integration density, efficient operation at low energy per bit and ultra-fast modulation, which would make them attractive for future low-power optical interconnects. For this application, such devices are required to be efficient, waveguide-coupled and integrated on a silicon substrate. We demonstrate a metal-cavity light-emitting diode coupled to a waveguide on silicon. The cavity consists of a metal-coated III-V semiconductor nanopillar which funnels a large fraction of spontaneous emission into the fundamental mode of an InP waveguide bonded to a silicon wafer showing full compatibility with membrane-on-Si photonic integration platforms. The device was characterized through a grating coupler and shows on-chip external quantum efficiency in the 10 â '4-10 â '2 range at tens of microamp current injection levels, which greatly exceeds the performance of any waveguide-coupled nanoscale light source integrated on silicon in this current range. Furthermore, direct modulation experiments reveal sub-nanosecond electro-optical response with the potential for multi gigabit per second modulation speeds.

Original languageEnglish
Article number14323
Pages (from-to)1-8
Number of pages8
JournalNature Communications
Volume8
DOIs
Publication statusPublished - 2 Feb 2017

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