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A III–V on silicon heterogeneous integrated laser with highly efficient single-stage adiabatic coupler is presented in this paper. The structure consists of an electrically pumped III–V ridge waveguide gain section on silicon, III-V/Si optical adiabatic coupler, and silicon-on-insulator (SOI) nanophotonic waveguide. The adiabatic coupler is 50-μm long and is formed by tapering the III–V ridge and...
We propose many-element cascaded-resonator devices with gapless non-evanescent inter-cavity and waveguide-to-cavity coupling using double-notch-shaped microdisk resonators. We demonstrate such devices with up to 50 elements in a silicon nitride-on-silica substrate.
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