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Integrated optical circuits with nanophotonic devices have attracted significant attention due to its low power dissipation and light-speed operation. With light interference and resonance phenomena, the nanophotonic device works as a voltage-controlled optical pass-gate like a pass-transistor. This paper first introduces a concept of the optical pass-gate logic, and then proposes a parallel adder...
The on-chip integration of all-optical switches and random-access memories based on a photonic crystal (PhC) nanocavity having a carrier-induced optical nonlinearity are presented. 25-channel all-optical gate switching and the wavelength-division multiplexing operation by silicon PhC nanocavity arrays were demonstrated with a femto-joule energy level. For the all-optical memory, an InP-based PhC nanocavity...
This paper reviews our recent studies of ultralow-power nanophotonics devices towards implementing a dense optical communication network into a processor chip. A photonic crystal nanocavity that has a very large Q/V ratio is a very promising tool for reducing the consumption energy and footprint for this goal. We show several examples of photonic-crystal nanocavity devices that exhibit record-low...
Silicon photonic crystal nanocavities were monolithically integrated to construct multichannel all-optical switches. Successful operation of 25 resonant channels was demonstrated with a length of only 200 μm and an energy consumption in the femtojoule regime.
A 5 GHz RZ clock optical pulse is modulated by a random control optical pulse train using photonic crystal nanocavity switches. In addition, we significantly improve the switching speed by introducing argon ions
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