Long-range hybrid plasmonic waveguide of graded-index InGaAsP active layer based on InP_language correction

doi:10.21203/rs.3.rs-3467799/v1

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Research Article

Long-range hybrid plasmonic waveguide of graded-index InGaAsP active layer based on InP_language correction

https://doi.org/10.21203/rs.3.rs-3467799/v1

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A hybrid plasmonic waveguide based on indium phosphide (InP) was proposed for nanoscale optical confinement and long-range propagation at a wavelength of 1.55 µm. The waveguide consists of an InGaAsP layer designed as a ridge with a gold cap. The InGaAsP materials are suitable for InP substrates. The refractive index of In_1 − xGa_xAs_yP_1−y was graded by changing the mole fraction to improve the confinement and propagation length compared with the conventional one. Changing only the y parameter with constant x results in a propagation length increase compared to the inverse case, changing only the parameter x. This parallels good results in the mode effective area (A_eff) and figure-of-merit (FoM) for the exact condition of changing y, expressing a good confinement condition. A propagation length of 40 µm is achieved with better confinement than the standard hybrid case. The designs proposed in this paper were simulated using COMSOL Multiphysics.

Optical Materials and Devices

Photonics/optics

hybrid plasmonic waveguide

In1−xGaxAsyP1−y

graded index

propagation length

mode effective area

figure of merit