Light coupling between vertical III-As nanowires and planar Si photonic waveguides for the monolithic integration of active optoelectronic devices on a Si platform
Author(s) -
Ivano Giuntoni,
Lutz Geelhaar,
J. Bruns,
Henning Riechert
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.018417
Subject(s) - materials science , nanowire , planar , grating , optoelectronics , photonics , optics , waveguide , photodetector , coupling (piping) , photonic integrated circuit , interfacing , diffraction grating , slow light , photonic crystal , physics , computer graphics (images) , computer science , metallurgy , political science , law
We present a new concept for the optical interfacing between vertical III-As nanowires and planar Si waveguides. The nanowires are arranged in a two-dimensional array which forms a grating structure on top of the waveguide. This grating enables light coupling in both directions between the components made from the two different material classes. Numerical simulations show that this concept permits a light extraction efficiency from the waveguide larger than 45% and a light insertion efficiency larger than 35%. This new approach would allow the monolithic integration of nanowire-based active optoelectronics devices, like photodetectors and light sources, on the Si photonics platform.
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