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Optical buffering and nonlinear enhancement is demonstrated using slow light in photonic crystal waveguide devices. Nearly 350 ps delay and tunability are obtained in a narrowband device, while 22 bit tunability in a wideband device.
We evaluated a large birefringence of 0.85 in a SOI layer by totally analyzing the measured index and theoretical and experimental dispersion characteristics of Si photonic wires. It was applied to an ultracompact polarization-insensitive AWG.
We fabricated lattice-shifted photonic crystal waveguides stably showing low dispersion slow light in a wide wavelength bandwidth. The two photon absorption and self-phase modulation were clearly enhanced for sub-ps optical pulses.
A low group velocity of c/130 was obtained under zero GVD condition in photonic crystal coupled waveguides, which will be effective for optical buffering.
We observed the light propagation characteristics in a photonic crystal waveguide, exhibiting low group velocity and low dispersion in a wide normalized bandwidth of 0.7%.
We fabricated a photonic crystal superlens and clearly observed the focusing of light by the negative reflection, for the first time. It well agreed with the dispersion surface analysis and the FDTD simulation.
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