Fig. 8
From: Bound states in the continuum and long-lived electronic resonances in two-tangent loops cavity
(a) The solid line presents a zoom-in plot for the resonance given in Fig. 6b with \(\delta =11\) nm. The dashed red line presents the approximate expression Eq. (23) for \(\Delta =0.05 \pi\). The approximate results are in a very good agreement with the exact ones (solid lines) and clearly show that the resonance is of Fano type with \(q_1\simeq 11.47\), \(q_2\simeq 14.31\) and width \(2\Gamma \simeq 0.049348\). (b) variation of the logarithm of the quality factor Q of the peak reported in (a) as a function of the tuning parameter \(\delta\). One can notice that the quality factor of the peak depends on the value of \(\delta\) and as predicted diverges when \(\delta =10\) nm.
