Light propagation in uniform arrays of photonic crystal waveguides is studied. We demonstrate that, in stark contrast to the case of conventional waveguide arrays, diffraction can be tailored both in magnitude and sign by varying only the spacing between adjacent waveguides. Diffraction management in ultracompact arrays of straight photonic crystal waveguides is demonstrated by solving Maxwell’s equations through the time-domain finite-element method.
© 2005 Optical Society of America
Andrea Locatelli, Matteo Conforti, Daniele Modotto, and Costantino De Angelis, "Diffraction engineering in arrays of photonic crystal waveguides," Opt. Lett. 30, 2894-2896 (2005)