Figure 1.

Schematic diagram of a 7.5 period, 1D, PhC with triple LC defects. The defects are realised in the second, fourth, and sixth periods (denoted by numbers). A Si wall thickness with fluctuation ± δ d_Si in each lattice period causes a variation of groove thickness . The lattice constant is . The optical contrast of the defect-free PhC is n_Si/n_air.