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Ultrasmall InGaAsP optical modulators were realized using a photonic crystal waveguide/nanocavity with a small-capacitance p-i-n junction and the Franz-Keldysh effect. Eye patterns reaching 56 Gb/s and a record-low charging energy of <100 aJ/bit were evaluated.
We evaluated high-speed behaviour of electrically driven photonic crystal lasers by direct modulations and found that they had 17.8-GHz 3-dB bandwidth. A 25-Gbit/s eye diagram was also demonstrated with a bias current as low as 150 μA.
We demonstrated the direct modulation of photonic-crystal nanocavity lasers to realize on-chip optical interconnects. A maximum 3-dB bandwidth of 16.2 GHz was obtained. We achieved a 17-Gb/s eye opening with a 35.3-fJ/bit energy cost.
We demonstrate direct modulation of an electrically driven photonic crystal nanocavity laser for the first time. Employing ultracompact embedded active-region and lateral current injection structure, the device operates at 10 Gbit/s with ultra-low operating energy.
Photonic crystals were proposed over two decades ago to realize strong light confinement via their perfect photonic bandgaps, but the expected ultrahigh- wavelength-sized cavities were achieved just recently in a slightly different system that has only a partial bandgap, more specifically, a modulated mode-gap cavity in a 2-D photonic crystal. It is now possible to store photons for over a nanosecond...
We propose a three-terminal device based on an optical injection-locked photonic crystal laser to achieve high-speed off-chip interconnection to meet future network-on-chip needs. 40 Gb/s large-signal direct modulation and more than three times bandwidth enhancement are demonstrated.
We describe the room temperature CW operation of an ultra-small buried heterostructure photonic crystal laser. The threshold power is only 1.5 µW, the fiber output power is 0.44 µW, and the 3-dB modulation speed is 5.5 GHz.
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