Figure 7
From: Defect modes in defective one dimensional parity-time symmetric photonic crystal
The transmittivity spectrum (a), reflectivity spectra for left incidence (b) and right incidence (c) under different numbers of unit cells \(N_0\) between the two defect layers. The black, red, and blue spectral lines correspond to \(N_0=2\), 4, and 10, respectively. The two defects are identical, and their parameters are the same as those in Figure 2, as are the other parameters.
