By optimizing parameters,an absolute band gap Δω=0.052? 2? ω_e(where ω_e=2πc/a,a is the lattice constant,c is light speed)is found at a low frequency field,with mid-frequency ω_(mid)=0.718?
In this thesis, a new finite difference time domain (FDTD) method is developed to treat a two-dimensional photonic crystal consisting of nearly-free-electron metals.
We present a numerical study of a finite photonic band gap structure with a χ(3) nonlinearity that couples two input pump beams at frequencies ω1 and ω2.