Crystal constituent

$\frac{\omega a}{2\pi c}$

The mid-gap frequency of the gap (ω_m)

Band-gap width

(Δω)

Gap-midgap ratio

(Δω/ω_m)

Gap percentage

(%)

Hexagonal lattice of air holes in Ge

0.15229 - 0.16426

0.1586047011012

0.01260062381216

0.07944672336110

7.94