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A working small-footprint asymmetrically and vertically coupled hybrid Si/GaN microring resonator (HMR) was demonstrated. The HMR of a minimum radius of 20 $\mu\hbox{m}$ was fabricated in a high-yield ( $\sim$90%) hybrid nanophotonic platform that allowed interactions between the GaN microring and the underlying Si waveguide circuit. The HMR's spectral response across the telecommunication C- and...
Optical characteristics of silicon nanowire waveguide connections are studied both theoretically and experimentally. Effects of geometrical sizes and positional alignments on optical performance are investigated. Results show that waveguide connections with tips wider than 500 nm and tip angles greater than critical angle enable high transmittance and less sensitivity to positional misalignments....
A 500 nm wide 260 nm thick 63.4 mum long silicon microring waveguide was suspended in air by connecting to a comb actuator with the low-loss suspension arms. The airgap between the microring and the input/output waveguides was adjusted by a voltage applied to the comb actuator to vary the coupling efficiency. Transmittance from the input to the drop waveguides was varied from 0% at the gap of 750...
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