We propose a novel multimode interference-based two-dimensional photonic crystal power splitter that can be applied to photonic integrated circuits. Through fine tuning the position of the leading central dielectric column between the two output waveguides, we substantially increase the bandwidth of the power splitter. Based on the simulations with the finite different time domain method, we find that the transmission spectra of the proposed splitter have a much higher upper 3db cut-off wavelength than the conventional multimode interference-based photonic crystal power splitter has, and the bandwidth of the proposed splitter is effectively increased up to 28%.
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