Mode Analysis of AlGaAs Based Hybrid Metal Insulator Plasmonic Waveguide with Nanoscale Confinement

An aluminum gallium arsenide (AlGaAs) based hybrid metal insulator plasmonic waveguide (HMIPW) has been investigated to analyze the optical properties of fundamental and higher order modes, such as real part of effective index, normalized effective mode area, and propagation length at 1550 nm of wavelength. The modal investigations have been done by varying the thicknesses of high index, low-index, and metal regions. The propagation length, up to 480 µm has been achieved, for the fundamental mode propagation. The multi-mode analysis presented in the current work can be extended for the analysis of biosensors, multimode interferometer, high speed optical signal processing, etc.