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 dSi in each lattice period causes a variation of groove thickness . The lattice constant is . The optical contrast of the defect-free PhC is nSi/nair.
Baldycheva et al. Nanoscale Research Letters 2012 7:387 doi:10.1186/1556-276X-7-387