Abstract

We are proposing a procedure to enhance the transmission efficiency of $60°$ photonic crystal (PhC) waveguide bends by means of selective optofluidic infiltration of an air hole, which is created as a point defect at the center of the conventional $60°$ PhC bend. Numerical studies demonstrate that by varying the defect radius and indices of optical fluids, one may enhance the bend transmission level and tune its $3\mathrm{dB}$ bandwidth over a substantial range of $88–138\mathrm{nm}$. In order to perform the numerical simulations, we have used two-dimensional (2D) finite difference time domain plane wave method, keeping in mind that the spectral features obtained by these 2D calculations are about 15% redshifted from those of real three-dimensional structures.

© 2011 Optical Society of America

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