Fig. 2
From: Double defects-induced elastic wave coupling and energy localization in a phononic crystal
In-phase and out-of-phase defect mode shapes (out-of-plane displacement fields) for the phononic crystal with the double defects (4, 7) at defect band frequencies presented in Fig. 1(c): a 56.80 kHz, b 57.06 kHz, c 56.71 kHz, d 57.12 kHz, e 56.86 kHz, f 57.16 kHz, g 59.51 kHz (in-phase monopole-like defect mode shape), h 59.85 kHz (out-of-phase monopole-like defect mode shape), i 60.75 kHz, and j 61.45 kHz