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

V. Dolores-Calzadilla (), B. Romeira (), F. Pagliano, S. Birindelli, A. Higuera-Rodriguez, P. J. van Veldhoven, M. K. Smit, A. Fiore and D. Heiss
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V. Dolores-Calzadilla: Photonic Integration, Eindhoven University of Technology
B. Romeira: Photonics and Semiconductor Nanophysics, Eindhoven University of Technology
F. Pagliano: Photonics and Semiconductor Nanophysics, Eindhoven University of Technology
S. Birindelli: Photonics and Semiconductor Nanophysics, Eindhoven University of Technology
A. Higuera-Rodriguez: Photonic Integration, Eindhoven University of Technology
P. J. van Veldhoven: NanoLab@TU/e, Eindhoven University of Technology
M. K. Smit: Photonic Integration, Eindhoven University of Technology
A. Fiore: Photonics and Semiconductor Nanophysics, Eindhoven University of Technology
D. Heiss: Photonic Integration, Eindhoven University of Technology

Nature Communications, 2017, vol. 8, issue 1, 1-8

Abstract: 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 10−4–10−2 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.

Date: 2017
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DOI: 10.1038/ncomms14323

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