Extended Data Fig. 4: Topologically trivial C5 disclination structure.
From: Vortex nanolaser based on a photonic disclination cavity
a, Calculated energy spectrum in a C5 symmetric disclination structure based on the trivial unit cell (inset). The orange box indicates the bandgap at t1 = –1.0 and t2 = –0.2. Because a trivial lattice has no corner states, fractional charges are not trapped in a disclination structure32. Thus, there are no in-gap modes observed. b, Calculated frequency of eigenmodes in a photonic disclination cavity based on the trivial unit cell (inset), which was constructed using the TB structure in a. Similar to a, no resonant mode is localized in the core of the cavity. The scale bar (inset) is 1 μm.
