Fig. 2: Design of the triple-lattice photonic-crystal resonator.
a Schematic of the triple-lattice photonic-crystal resonator, composed of three lattice point groups (indicated in different colors). Yellow arrows indicate the propagating waves diffracted by the lattice. The blue square shows a unit cell. The lattice constant a is approximately equal to the wavelength in the material, λn. b Unit cell of the triple-lattice photonic crystal. The centers of the holes are marked as points 1–3, the coordinates of which are given accordingly. c |A2,0| as a function of d1x and d2x. Two of the maximum points are marked as points I and II
