Multimode Interference Power-Splitter Using InP-Based Deeply Etched Hybrid Plasmonic Waveguide

چکیده مقاله

Abstract—The present study proposes a novel nanoscale multimode
interference (MMI) power splitter utilizing an InP-based
hybrid plasmonic waveguide at an optical communication wavelength.
The layer stack has the potential to realize monolithic
integrated hybrid plasmonic passive and active components.
The 1 × 2, 1 × 3, and 2 × 2 MMI power splitters were simulated
and optimized using a three-dimensional finite difference time domain
method. The effect of MMI length, width, and wavelength
on optical power transmission was investigated. Transmission was
higher than 90% at 1.55 µm wavelengths. This study also presents
an ultracompact shallowto deep transition between shallow-etched
conventional waveguide and a hybrid plasmonic waveguide on an
InP-substrate. It was shown that shallow to deep transition with a
length of 2 µm has a coupling efficiency of 87.5%.