Figure 4
From: Fiber guiding at the Dirac frequency beyond photonic bandgaps
The steady-state electric fields in the germania fiber at the end of the FDTD simulations. The fiber has the cross-section structure shown in Figure 1a, where a=2.21 μm, ra=0.47a, R=1.9a, and εr=1.592. The |E| fields are recorded at t=8000 fs and displayed by a monitor in the yz cut plane that runs directly through the center axis of the fiber at x=0, ranging from z=0 to z=1200 μm in the z-direction and from y=–32.535 to y=32.535 μm in the y-direction. (a–d) correspond to the four red crosses labeled 4a–4d in Figure 2e: (a) |E| field for ωa/2πc= 1.432, (b) |E| field for ωa/2πc=1.624, (c) |E| field for ωa/2πc=1.694, and (d) |E| field for ωa/2πc=1.724.
