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. 2015 Feb 24;5:8568. doi: 10.1038/srep08568

Figure 7.

Figure 7

Imaginary parts of the scaled propagation constants β(m)/k0 pertaining to the supermodes of order m = 1 (empty markers) and m = 2 (full markers) of the SUSY*-based compound profile in Eq. (19), for w = 2λ0, (a) as a function of the normalized distance D (for |Im(Δε1)| = 0.015), and (b) as a function of the non-Hermiticity parameter |Im(Δε1)| (for D = 1.02). (c), (d) Same as above, but for the supermode of order m = 3. (e), (f) Same as above, but for the supermodes of order m = 4 (empty markers) and m = 5 (full markers).