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

چکیده مقاله

The present study proposes a novel nano-scale multimode interference (MMI) power splitter utilizing an InP-based hybrid plasmonic (HP) 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 3D 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 ultra-compact shallow to 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%.