Design of photonic crystal power couplers via gratinglike surfaces

Design and fabrication of high efficiency power coupler between different photonic crystal waveguides

“…[16][17][18] Following a strategy which we have previously described in detail in Ref. 18, gratinglike surfaces between two PC waveguides can theoretically result in efficient power coupling. Basically, the strategy is to separate the two PC waveguide regions, and in the space between the regions insert two rows of holes.…”

“…Detailed information about the GA is available in Ref. 18. In particular, the optimum parameters for this structure are the following: r 1 = 0.7878a, r 2 = 1.6487a, r 3 = 1.0000a, r 4 = 1.4122a, r 5 = 0.4268a, r 6 = 1.9268a, r 7 = 0.6634a, and r 8 = 1.1707a.…”