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We propose and demonstrate reconfigurable microfiber-coupled photonic crystal (PhC) lasers. By placing a curved microfiber on a PhC slab waveguide, the effective index of the contacted PhC waveguide region is slightly increased in comparison to that of the other un-contacted parts of the waveguide. In the proximity of a properly-selected spectral position in the PhC dispersion curve, the physical...
Characteristics of wavelength-scale photonic crystal cavity modes are controlled by utilizing the spatial symmetry. A robust photonic crystal single-cell structure supporting only one resonant lasing mode is proposed and demonstrated, based on the mirror symmetry selection rule. In addition, the directional vertical beaming is achieved through the loss engineering based on the symmetry perturbation,...
We demonstrate extremely low-power all-optical bistability by using photonic crystal linear resonators based on InGaAsP quantum-wells. Since the photonic crystal cavity has a high quality-factor and a small mode-volume, the photon density in the cavity is extremely high, which makes it possible to reduce the bistable power. The measured minimum bistable threshold power was 37 muW by using a fiber...
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