Abstract

In this paper, we have introduced a surface plasmonic two-mode interference (SPTMI) coupler having a silicon core, GaAsInP side cladding, and silver top and bottom cladding as an optical power splitter. A wide range of tunability from the $50:50$ splitting ratio to $1:99$ is achieved by refractive index modulation of the GaAsInP cladding with application of varying optical pulse power. The coupling length of the SPTMI-based splitter is $\sim 11.5$ times less than that of a previously reported optical power splitter based on multimode waveguide holograms. The proposed optical power splitter has potential in development of large-scale integrated circuits due to its compactness and high fabrication tolerance.

© 2018 Optical Society of America

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