Abstract
Local light intensity at a defect in a photonic crystal structure is greatly enhanced from the input light intensity by the existence of the photonic state localized around the defect. Enhancement of effective optical nonlinearity of photonic crystal structures with a defect which has optical nonlinearity was considered theoretically, and studied experimentally. In experiment, intensity dependence of the transmittance was measured, and reduction of the effective saturation intensity by factor of 20 was observed.
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