Dispersion engineering of photonic crystal waveguides with ring-shaped holes.
The geometry of photonic crystal waveguides with ring-shaped holes is optimized to minimize dispersion in the slow light regime. We found geometries with a nearly constant group index in excess of 20 over a wavelength range of 8 nm. The origin of the low dispersion is related to the widening of the propagating mode close to the lower band gap edge.
Säynätjoki
A
A
Mulot
M
M
Ahopelto
J
J
Lipsanen
H
H