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We report an enhancement of coupling efficiency between an optical fiber and graphene photonic device integrated on a silicon photonics platform. The design and optimization of selective spot-size converters (SSSCs) enables low coupling losses of 1.4 dB/facet for TE and 2.4 dB/facet for TM modes without causing damage to the graphene. In order to maximize the potential of the perfect wavelength independent...
We describe a Si–Ge–silica monolithic integration platform for telecommunications applications. The monolithic integration process features low-temperature silica film deposition by electron-cyclotron-resonance chemical vapor deposition to prevent thermal damage to Si/Ge active devices. The monolithically integrated Si and SiOx waveguides show propagation losses of 2.8 and 0.9 dB/cm, and the inverse-tapered...
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