In this paper we report TE-mode phase modulation obtained by inducing a capacitive charge on graphene layers embedded in the core of a waveguide.There is a biasing regime in which graphene absorption is negligible but...In this paper we report TE-mode phase modulation obtained by inducing a capacitive charge on graphene layers embedded in the core of a waveguide.There is a biasing regime in which graphene absorption is negligible but large index variations can be achieved with a voltage–length product as small as V_(π)L_(π)≃0.07 V cm for straight waveguides and V_(π)L_(π)≃0.0024 V cm for 12μm radius microring resonators.This phase modulation device uniquely enables a small signal amplitude<1 V with a micrometer-sized footprint for compatibility with CMOS circuit integration.Examples of phase-induced changes are computed for straight waveguides and for microring resonators,showing the possibility of implementing several optoelectronic functionalities as modulators,tunable filters,and switches.展开更多
Silicon-based photonics technology,which has the DNA of silicon electronics technology,promises to provide a compact photonic integration platform with high integration density,mass-producibility,and excellent cost pe...Silicon-based photonics technology,which has the DNA of silicon electronics technology,promises to provide a compact photonic integration platform with high integration density,mass-producibility,and excellent cost performance.This technology has been used to develop various photonic devices based on silicon,such as waveguides,filters,and modulators.In addition,germanium photodetectors have been built on a silicon-based photonic platform.These photonic devices have already been monolithically integrated,and a group-IV photonic platform based on silicon and germanium,or standard group-IV materials,has been established.Moreover,photonics–electronics convergence is now being pursued based on this platform.展开更多
We propose and experimentally demonstrate capacitive actuation of a graphene–silicon micro-ring add/drop filter. The mechanism is based on a silicon–SiO_2–graphene capacitor on top of the ring waveguide. We show th...We propose and experimentally demonstrate capacitive actuation of a graphene–silicon micro-ring add/drop filter. The mechanism is based on a silicon–SiO_2–graphene capacitor on top of the ring waveguide. We show the capacitive actuation of the add/drop functionality by a voltage-driven change of the graphene optical absorption. The proposed capacitive solution overcomes the need for continuous heating to keep tuned the filter's in/out resonance and therefore eliminates "in operation" energy consumption.展开更多
文摘In this paper we report TE-mode phase modulation obtained by inducing a capacitive charge on graphene layers embedded in the core of a waveguide.There is a biasing regime in which graphene absorption is negligible but large index variations can be achieved with a voltage–length product as small as V_(π)L_(π)≃0.07 V cm for straight waveguides and V_(π)L_(π)≃0.0024 V cm for 12μm radius microring resonators.This phase modulation device uniquely enables a small signal amplitude<1 V with a micrometer-sized footprint for compatibility with CMOS circuit integration.Examples of phase-induced changes are computed for straight waveguides and for microring resonators,showing the possibility of implementing several optoelectronic functionalities as modulators,tunable filters,and switches.
文摘Silicon-based photonics technology,which has the DNA of silicon electronics technology,promises to provide a compact photonic integration platform with high integration density,mass-producibility,and excellent cost performance.This technology has been used to develop various photonic devices based on silicon,such as waveguides,filters,and modulators.In addition,germanium photodetectors have been built on a silicon-based photonic platform.These photonic devices have already been monolithically integrated,and a group-IV photonic platform based on silicon and germanium,or standard group-IV materials,has been established.Moreover,photonics–electronics convergence is now being pursued based on this platform.
文摘We propose and experimentally demonstrate capacitive actuation of a graphene–silicon micro-ring add/drop filter. The mechanism is based on a silicon–SiO_2–graphene capacitor on top of the ring waveguide. We show the capacitive actuation of the add/drop functionality by a voltage-driven change of the graphene optical absorption. The proposed capacitive solution overcomes the need for continuous heating to keep tuned the filter's in/out resonance and therefore eliminates "in operation" energy consumption.
