Table 1 The C2 symmetries and radiating features of eigenmodes in PhCs with and without periodic perturbations
From: Brillouin zone folding driven bound states in the continuum
Modes | Without perturbation | Gap perturbation | Radius perturbation |
|---|---|---|---|
Ma/Ca | M | C | |
TE4,Γ / 40,Γ | +1b/+1(BIC) | +1 (BIC) | +1 (BIC) |
TE1,X / 11,Γ | −1b/+1 (GM) | −1 (GR) | +1 (BZF-BIC) |
TE2,X / 21,Γ | +1/ −1 (GM) | +1 (BZF-BIC) | −1(GR) |
TE3,X / 31,Γ | −1/+1 (GM) | −1(GR) | +1 (BZF-BIC) |
TE4,X / 41,Γ | −1/+1 (GM) | −1(GR) | +1 (BZF-BIC) |
TE5,X / 51,Γ | +1/−1 (GM) | +1 (BZF-BIC) | −1(GR) |
